{"title":"Civic Si 2006-2011 Exhaust","description":null,"products":[{"product_id":"magnaflow-3-universal-stainless-steel-catalytic-converter","title":"MagnaFlow Universal Stainless Steel Catalytic Converter","description":"\u003cul\u003e\n\u003cli\u003eHi-Flow Design \u003c\/li\u003e\n\u003cli\u003eFederal \/ EPA Compliant (Non-California) \u003c\/li\u003e\n\u003cli\u003eOverall Length 9\" Width 4\" \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e  \u003cli\u003e\u003ca href=\"#TechnicalData\"\u003eTechnical Data\u003c\/a\u003e\u003c\/li\u003e   \u003cli\u003e\u003ca href=\"#Included\"\u003eIncluded\u003c\/a\u003e\u003c\/li\u003e  \u003cli\u003e\u003ca href=\"#InstallGuide\"\u003eInstall Guide\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003cp\u003eThese MagnaFlow universal catalytic converters are weld in replacements for the times you cannot run a direct fit unit. If you are building a custom exhaust, fixing a modified setup, or just need freedom to place the cat where your chassis and piping actually allow it, this is the play. Your catalytic converter does the real emissions work, it promotes chemical reactions that knock down tailpipe pollutants, and placement in the exhaust stream matters.\u003c\/p\u003e\n\n\u003cp\u003eHere’s the trade off versus a direct fit. An automotive universal catalytic converter skips the vehicle specific flanges, brackets, and OE routing, so you gain flexibility but you also take on more work. You pick by tube size and packaging, then set it where it fits and weld it in. These qualify as an EPA compliant catalytic converter for Federal applications where allowed, but they are not CARB certified, so don’t buy one for a CARB state and hope for the best.\u003c\/p\u003e\n\n\u003cp\u003eBoth SKUs use a stainless steel spun body with straight through weld on connections. MagnaFlow does not include clamps, gaskets, or mounting hardware, so plan on measuring, cutting, and welding. Also, these bodies do not list hangers or sensor ports, which means you or your exhaust shop must figure out oxygen sensor placement and support the system correctly. If you have ever heard someone say, “Universal means universal headaches,” this is what they meant, but the fitment freedom is worth it when your build needs it. We still use this exact style of MagnaFlow exhaust converter on our own cars when a direct fit option doesn’t match the setup.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFederal emissions status\u003c\/strong\u003e: MagnaFlow EPA catalytic converter for Federal EPA compliant use, not CARB certified\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFit type\u003c\/strong\u003e: Universal catalytic converter\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnection type\u003c\/strong\u003e: Weld on inlet and weld on outlet\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody material\u003c\/strong\u003e: MagnaFlow stainless catalytic converter, stainless steel catalytic converter body\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody type and shape\u003c\/strong\u003e: Spun, round\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeat shield\u003c\/strong\u003e: None\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHangers included\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClamps included\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSensor ports\u003c\/strong\u003e: None listed\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ctable\u003e\n  \u003ctr\u003e\n    \u003cth\u003eSKU\u003c\/th\u003e\n    \u003cth\u003eInlet inside diameter\u003c\/th\u003e\n    \u003cth\u003eOutlet inside diameter\u003c\/th\u003e\n    \u003cth\u003eBody width\u003c\/th\u003e\n    \u003cth\u003eBody length\u003c\/th\u003e\n    \u003cth\u003eOverall length\u003c\/th\u003e\n    \u003cth\u003eSubstrate material\u003c\/th\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e\u003cstrong\u003eMAG59959\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd\u003e3 inch\u003c\/td\u003e\n    \u003ctd\u003e3 inch\u003c\/td\u003e\n    \u003ctd\u003e4 inch\u003c\/td\u003e\n    \u003ctd\u003e8 inch\u003c\/td\u003e\n    \u003ctd\u003e8 inch\u003c\/td\u003e\n    \u003ctd\u003eMetallic\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e\u003cstrong\u003eMAG54956\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd\u003e2.5 inch\u003c\/td\u003e\n    \u003ctd\u003e2.5 inch\u003c\/td\u003e\n    \u003ctd\u003e4 inch\u003c\/td\u003e\n    \u003ctd\u003e9.75 inch\u003c\/td\u003e\n    \u003ctd\u003e9.75 inch\u003c\/td\u003e\n    \u003ctd\u003eCeramic\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cp\u003ePick based on tube diameter first, then make sure you have the length to physically fit it. SKU MAG59959 matches 3 inch exhaust tubing and keeps things compact with an 8 inch overall length, handy when space gets tight. SKU MAG54956 matches 2.5 inch tubing and runs a 9.75 inch overall length. MAG54956 also uses a ceramic substrate, so if you are specifically shopping for a MagnaFlow ceramic substrate converter, that is the one. If you want a hi-flow universal catalytic converter vibe for a custom system, these are commonly used, but real world results still depend on the rest of your exhaust and how clean the install is.\u003c\/p\u003e\n\n\u003cp\u003eBefore you commit, confirm emissions legality for your registration area, confirm placement in the exhaust, and make a plan for O2 sensors and hangers. MagnaFlow converter vehicle fitment on universal parts comes down to your measurements and your installer’s choices, not a bolt on guarantee. Welding and fabrication are required. If you need an auto catalytic converter Magnaflow option for a custom setup, or you are searching vehicle catalytic converter Magnaflow for a non standard exhaust, this MagnaFlow universal catalytic converter lineup covers the basics with straightforward sizing.\u003c\/p\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n  \n  \n\u003cul\u003e \n  \u003cli\u003eUniversal\u003c\/li\u003e\n  \u003cli\u003eOveral Length - 9\"\u003c\/li\u003e\n  \u003cli\u003eOveral Width - 4\"\u003c\/li\u003e\n\n\u003c\/ul\u003e\n\n \n\u003c\/li\u003e\n\n\n\n\n\u003cli id=\"TechnicalData\"\u003e\n   \n\u003c\/li\u003e\n\n\n\n \n\u003cli id=\"Included\"\u003e\n\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\u003cli id=\"InstallGuide\"\u003e\n \n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n","brand":"Magnaflow","offers":[{"title":"Default Title","offer_id":44770824421410,"sku":"mag54956","price":117.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/products\/fa8b97bba4d3813ff6aa59bf4550e68f.jpg?v=1621452300"},{"product_id":"dc-sports-universal-round-muffler-3-inlet-3-outlet","title":"DC Sports Universal Round Muffler 3\" Inlet \/ 3\" Outlet","description":"\u003cul\u003e\n\u003cli\u003eProvides an Aggressive Exhaust Note Over OEM \u003c\/li\u003e\n\u003cli\u003eInlet 3\" (76mm), Outlet 3\" (76mm) \u003c\/li\u003e\n\u003cli\u003eBody Length 12\" (304mm), Total Length 17\" (431mm) \u003c\/li\u003e\n\u003cli\u003eBody Width 6\" (152mm) \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e  \u003cli\u003e\u003ca href=\"#TechnicalData\"\u003eTechnical Data\u003c\/a\u003e\u003c\/li\u003e   \u003cli\u003e\u003ca href=\"#Included\"\u003eIncluded\u003c\/a\u003e\u003c\/li\u003e  \u003cli\u003e\u003ca href=\"#InstallGuide\"\u003eInstall Guide\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003ch3\u003eDC Sports Round Muffler, 3\" Inlet \/ 3\" Outlet\u003c\/h3\u003e\n\n\u003cp\u003e\n  If you want a true 3\" round muffler with matching inlet and outlet diameters, this is the one. The DC Sports universal muffler (SKU: DCMU-300-R) uses a straight through muffler 3 inch core, so it flows like it should and does not feel like an OEM suitcase muffler choking the car. On a typical 3 inch setup, you can expect cleaner top end pull and quicker throttle response, plus a deeper note that sounds like an exhaust, not a vacuum cleaner.\n\u003c\/p\u003e\n\n\u003cp\u003e\n  DC Sports builds this DC Sports performance muffler from T 304 stainless steel with a polished shell, so it holds up to heat cycles, road grime, and daily abuse without turning into a rusty science project. Call it what it is, a polished exhaust muffler that is meant to get used. This DC Sports exhaust muffler also keeps exhaust velocity up thanks to the straight through layout, which is the whole point of a high flow exhaust muffler.\n\u003c\/p\u003e\n\n\u003cp\u003e\n  Fitment is straightforward for a custom system. This round muffler 3 inch inlet and 3 inch outlet works anywhere you run 3 inch pipe, NA street cars, turbo builds, or anything in between, as long as you have room for the 6 inch round body. Think of it as an easy DC Sports exhaust upgrade when you want a compact can that still acts like a real performance exhaust muffler, not a tiny restriction.\n\u003c\/p\u003e\n\n\u003cp\u003e\n  Let us be honest, this is a loud exhaust muffler compared to stock. Volume depends on your whole combo, headers, cat, resonator, pipe length, and where you mount it, but wide open throttle will get everybody's attention. If you pair it with a decent resonator and keep the rest of the system sensible, it sounds aggressive without feeling like an uncontrolled straight pipe.\n\u003c\/p\u003e\n\n\u003cp\u003e\n  We have run this exact DC Sports race muffler on our own vehicles, and it is a solid way to finish a custom exhaust. If you are hunting for an aftermarket muffler 3 inch outlet that actually matches your piping and does not bottleneck the system, this DC Sports exhaust muffler fits the bill as a universal exhaust upgrade and a universal muffler 3 inch option.\n\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\n\u003cul\u003e\n  \u003cli\u003eDC Sports universal muffler 3 inch for custom exhaust systems\u003c\/li\u003e\n  \u003cli\u003eStraight through core for high flow and reduced backpressure\u003c\/li\u003e\n  \u003cli\u003eT 304 stainless construction for corrosion resistance and longevity\u003c\/li\u003e\n  \u003cli\u003ePolished finish for a clean look that is easy to keep looking good\u003c\/li\u003e\n  \u003cli\u003eInlet: 3 inches (76 mm), round muffler 3 inch inlet\u003c\/li\u003e\n  \u003cli\u003eOutlet: 3 inches (76 mm), 3 inch muffler round outlet\u003c\/li\u003e\n  \u003cli\u003eBody length: 12 inches (304 mm)\u003c\/li\u003e\n  \u003cli\u003eOverall length: 17 inches (431 mm)\u003c\/li\u003e\n  \u003cli\u003eBody diameter: 6 inches (152 mm)\u003c\/li\u003e\n  \u003cli\u003eWorks as a DC Sports exhaust upgrade for street builds and track focused setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n \nUniversal\u003cul\u003e \u003c\/ul\u003e\n \n\u003c\/li\u003e\n\n\n\n\n\u003cli id=\"TechnicalData\"\u003e\nInlet Diameter: 3.0\"\u003cdiv\u003eOutlet Diameter: 3.0\"\u003c\/div\u003e\n\u003c\/li\u003e\n\n\n\n \n\u003cli id=\"Included\"\u003e\n(1) Universal Round Muffler\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\u003cli id=\"InstallGuide\"\u003e\n \n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n","brand":"DC Sports","offers":[{"title":"Default Title","offer_id":40963800662050,"sku":"DCMU-300-R","price":69.98,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/DCMU-300-R_g3dq.jpg?v=1768852548"},{"product_id":"dc-sports-universal-oval-muffler-3-inlet-3-outlet","title":"DC Sports Universal Oval Muffler 3\" Inlet \/ 3\" Outlet","description":"\u003cul\u003e\n\u003cli\u003eProvides an Aggressive Exhaust Note Over OEM \u003c\/li\u003e\n\u003cli\u003eInlet 3\" (76mm), Outlet 3\" (76mm) \u003c\/li\u003e\n\u003cli\u003eBody Length  12\" (304mm), Total Length 17\" (431mm) \u003c\/li\u003e\n\u003cli\u003eBody Width 5\"x 8\" oval \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e  \u003cli\u003e\u003ca href=\"#TechnicalData\"\u003eTechnical Data\u003c\/a\u003e\u003c\/li\u003e   \u003cli\u003e\u003ca href=\"#Included\"\u003eIncluded\u003c\/a\u003e\u003c\/li\u003e  \u003cli\u003e\u003ca href=\"#InstallGuide\"\u003eInstall Guide\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003ch3\u003eDC Sports Universal Oval Muffler, 3.0\" Inlet \/ 3.0\" Outlet\u003c\/h3\u003e\n\n\u003cp\u003e\n  If your stock muffler feels like a giant restriction, this DC Sports universal muffler fixes the problem the simple way. You get a straight through exhaust muffler core with a true 3 inch inlet muffler and 3 inch outlet muffler, so it actually matches your 3 inch piping instead of necking down. That extra flow drops backpressure, and on most setups you’ll feel it as cleaner top end pull and sharper throttle response. It’s an improved performance muffler because it stops the muffler from being the choke point, not because of magic marketing.\n\u003c\/p\u003e\n\n\u003cp\u003e\n  Sound wise, this one lands in aggressive exhaust muffler territory, but it doesn’t chase the cheap raspy thing. The oval case helps it keep a deep exhaust note muffler tone under load, especially on higher compression NA builds and 3 inch turbo setups. We run this style of race inspired DC muffler on our own cars when we want more volume and flow without turning the car into a freeway headache. Expect louder than stock, and if your resonator setup is weak, expect it to let you know.\n\u003c\/p\u003e\n\n\u003cp\u003e\n  Material matters here. DC Sports uses T-304 DC Sports muffler stainless for the shell, so it holds up to heat cycles and weather a lot better than mild steel. The polished oval muffler finish also cleans up easily and stays looking good under the rear bumper. Packaging is another win. This DC Sports oval muffler tucks up nicer than a big round can, which makes it a solid universal performance muffler for tight chassis, lowered cars, and any custom project muffler build where clearance actually matters.\n\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\n\u003cul\u003e\n  \u003cli\u003eDC Sports oval muffler, DC Sports universal muffler, SKU: DCMU-300-ST\u003c\/li\u003e\n  \u003cli\u003ePerformance muffler 3 inch sizing with 3 inch inlet muffler and 3 inch outlet muffler\u003c\/li\u003e\n  \u003cli\u003eStraight through exhaust muffler core, high flow DC muffler design to reduce backpressure\u003c\/li\u003e\n  \u003cli\u003eT-304 DC Sports muffler stainless construction for corrosion resistance and long service life\u003c\/li\u003e\n  \u003cli\u003ePolished oval muffler exterior for a clean look that is easy to maintain\u003c\/li\u003e\n  \u003cli\u003eOval body profile for better clearance and easier packaging on tight exhaust routes\u003c\/li\u003e\n  \u003cli\u003eUniversal performance muffler fitment for custom exhaust systems on NA and turbo builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n \nUniversal\u003cul\u003e \u003c\/ul\u003e\n \n\u003c\/li\u003e\n\n\n\n\n\u003cli id=\"TechnicalData\"\u003e\n   \n\u003c\/li\u003e\n\n\n\n \n\u003cli id=\"Included\"\u003e\n\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\u003cli id=\"InstallGuide\"\u003e\n \n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n","brand":"DC Sports","offers":[{"title":"Default Title","offer_id":40963800694818,"sku":"DCMU-300-ST","price":69.98,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/DCMU-300-ST_1.jpg?v=1768854218"},{"product_id":"dc-sports-universal-round-muffler-25-inlet-3-outlet","title":"DC Sports Universal Round Muffler 2.5\" Inlet \/ 3\" Outlet","description":"\u003cul\u003e\n\u003cli\u003eWeld On Design \u003c\/li\u003e\n\u003cli\u003eInlet 2.5\" (63mm), Outlet 3\" (76mm) \u003c\/li\u003e\n\u003cli\u003eBody Length 12\" (304mm), Total Length 17\" (431mm)  \u003c\/li\u003e\n\u003cli\u003eProvides Aggressive, But Mature Sound \u003c\/li\u003e\n\u003cli\u003eBody width 6\" (152mm) \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e  \u003cli\u003e\u003ca href=\"#TechnicalData\"\u003eTechnical Data\u003c\/a\u003e\u003c\/li\u003e   \u003cli\u003e\u003ca href=\"#Included\"\u003eIncluded\u003c\/a\u003e\u003c\/li\u003e  \u003cli\u003e\u003ca href=\"#InstallGuide\"\u003eInstall Guide\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003ch3\u003eDC Sports Round Muffler - 2.5 Inlet\/3\" Outlet\u003c\/h3\u003e\n\u003cp\u003eIf your stock muffler is killing your sound and holding back your build, this is the clean, no-nonsense upgrade that finally lets your engine breathe. The DC Sports Universal Round Muffler uses a straight-through, race-inspired core that removes the restrictions built into most OEM mufflers. That means better flow, faster throttle response, and a deeper exhaust tone that doesn’t cross into the obnoxious, buzzy territory you get from cheap canisters.\u003c\/p\u003e\n\u003cp\u003e This muffler is built from polished T-304 stainless steel, so it shrugs off heat cycles, moisture, and road grime far better than the mild-steel factory mufflers that rot out over time. The high-gloss finish looks clean and premium under the bumper, perfect for someone building a street car, a weekend track setup, or a show-ready exhaust.\u003c\/p\u003e\n\u003cp\u003e Because it’s universal, it’s incredibly easy for any exhaust shop to weld into a custom system. The 2.5-inch inlet matches a huge range of aftermarket piping, while the 3-inch outlet gives you a modern, purposeful look without going oversized. DC Sports also makes these mufflers in different sizes and orientations, so fabricators can dial in the perfect fit.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003ch2\u003e\n\u003cspan style=\"font-size: 16px;\"\u003eWhen people shop for a universal muffler, they usually care about three things: \u003c\/span\u003e\u003cspan style=\"font-size: 16px;\"\u003esound, durability, and performance\u003c\/span\u003e\u003cspan style=\"font-size: 16px;\"\u003e. This muffler checks every one.\u003c\/span\u003e\n\u003c\/h2\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSound you actually want\u003c\/strong\u003e – The straight-through design creates a deeper, smoother tone without harsh rasp or drone.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eReal performance gains\u003c\/strong\u003e – Better flow means crisper response and improved high-RPM breathing, especially on turbo or high-revving NA engines.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePro-level durability\u003c\/strong\u003e – T-304 stainless construction resists rust and lasts far longer than factory mild-steel units.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEasy to fit\u003c\/strong\u003e – Universal sizing makes it simple for a shop to weld into almost any custom exhaust.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTrusted brand\u003c\/strong\u003e – DC Sports has been in the sport compact world for decades, so you’re not gambling on an unknown part from a random marketplace seller.\u003c\/li\u003e \u003c\/ul\u003e \u003ch2\u003e\u003cbr\u003e\u003c\/h2\u003e\n\u003ch2\u003ePerfect For\u003c\/h2\u003e \u003cul\u003e \u003cli\u003eReplacing a restrictive or quiet OEM muffler\u003c\/li\u003e \u003cli\u003eCustom exhaust setups on street, track, or show cars\u003c\/li\u003e \u003cli\u003eAnyone wanting deeper tone without going obnoxiously loud\u003c\/li\u003e \u003cli\u003eDrivers who want stainless durability without paying high-end prices\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e If you want a muffler that improves sound, sharpens the car’s response, and lasts longer than the OEM unit—while staying affordable—this DC Sports performance muffler hits the sweet spot. \u003c\/p\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n \nUniversal\u003cul\u003e \u003c\/ul\u003e\n \n\u003c\/li\u003e\n\n\n\n\n\u003cli id=\"TechnicalData\"\u003e\nInlet Diameter: 2.5\"\u003cdiv\u003eOutlet Diameter: 3.0\"\u003c\/div\u003e\n\u003c\/li\u003e\n\n\n\n \n\u003cli id=\"Included\"\u003e\n(1) Universal Muffler\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\u003cli id=\"InstallGuide\"\u003e\n \n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n","brand":"DC Sports","offers":[{"title":"Default Title","offer_id":40963800727586,"sku":"DCMU-2503-R","price":49.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/DCMU-2503-R_m4ot.jpg?v=1768847048"},{"product_id":"dc-sports-universal-oval-muffler-25-inlet-3-outlet","title":"DC Sports Universal Oval Muffler 2.5\" Inlet \/ 3\" Outlet","description":"\u003cul\u003e\n\u003cli\u003eProvides an Aggressive Exhaust Note Over OEM \u003c\/li\u003e\n\u003cli\u003eInlet-2.5\" (63mm), Outlet-3\" (76mm) \u003c\/li\u003e\n\u003cli\u003eBody Length- 12\" (304mm), Total Length- 17\" (431mm) \u003c\/li\u003e\n\u003cli\u003eBody Width- 5\"x 8\" Oval \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e  \u003cli\u003e\u003ca href=\"#TechnicalData\"\u003eTechnical Data\u003c\/a\u003e\u003c\/li\u003e   \u003cli\u003e\u003ca href=\"#Included\"\u003eIncluded\u003c\/a\u003e\u003c\/li\u003e  \u003cli\u003e\u003ca href=\"#InstallGuide\"\u003eInstall Guide\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003ch3\u003eDC Sports Round Muffler, 2.5\" Inlet, 3\" Outlet (SKU: DCMU-2503-ST)\u003c\/h3\u003e\n\n\u003cp\u003e\n  If your stock muffler sounds like a vacuum cleaner and chokes up past 5,000 RPM, this is usually where we start. The DC Sports 2.5 inlet muffler with a 3 inch exit hits that sweet spot for an aggressive exhaust muffler, but it doesn’t do the cheap canister thing where everything turns into rasp and buzz. You get an intentional sound, not noise for noise’s sake, and it works great as a DC Sports exhaust upgrade on anything from a daily to a weekend track car.\n\u003c\/p\u003e\n\n\u003cp\u003e\n  Inside, you’re looking at a straight through muffler design, basically a high flow muffler core that lets the exhaust move instead of bouncing through restrictive baffles. On the road, you’ll feel it most in throttle response and how cleanly the car pulls up top. The DC Sports exhaust note comes in deeper and smoother, and the volume stays predictable. One of our guys summed it up perfectly, \u003cem\u003e“Loud when you lean on it, calm when you cruise.”\u003c\/em\u003e That’s the vibe.\n\u003c\/p\u003e\n\n\u003cp\u003e\n  This one uses polished T-304 stainless, so it holds up to heat cycles, wet weather, and road grime way better than mild steel. It’s also a DC Sports polished muffler, so it still looks like you cared when you peek under the rear bumper a year later. Call it what it is, a DC Sports T-304 muffler you can run year round without babysitting it.\n\u003c\/p\u003e\n\n\u003cp\u003e\n  Fitment stays simple. The 2.5 inch inlet matches common piping, and the DC Sports 3 outlet muffler setup gives you a clean modern exit without going cartoonishly huge. Any competent exhaust shop can weld it into your DC Sports custom exhaust, and it also plays nice in a universal setup as a universal oval exhaust muffler alternative when you want round for packaging. If you need different shapes, DC Sports also offers a DC Sports oval muffler and the DC Sports 5x8 muffler, but this round body is the easy button when space matters.\n\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\n\u003cul\u003e\n  \u003cli\u003eDC Sports performance muffler with round body, compact and easy to package\u003c\/li\u003e\n  \u003cli\u003e2.5 inch inlet and 3 inch outlet, common sizing for custom exhaust builds\u003c\/li\u003e\n  \u003cli\u003eStraight through muffler design, high flow muffler core for better top end breathing\u003c\/li\u003e\n  \u003cli\u003eDeep controlled tone, less rasp, minimal drone when the rest of your system is set up right\u003c\/li\u003e\n  \u003cli\u003ePolished T-304 stainless construction, solid corrosion resistance for real street use\u003c\/li\u003e\n  \u003cli\u003eEasy to integrate into a DC Sports custom exhaust or a universal system at any exhaust shop\u003c\/li\u003e\n  \u003cli\u003eRace inspired muffler sound that stays street friendly when you’re just cruising\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n \nUniversal\u003cul\u003e \u003c\/ul\u003e\n \n\u003c\/li\u003e\n\n\n\n\n\u003cli id=\"TechnicalData\"\u003e\nInlet Diameter: 2.5\"\u003cdiv\u003eOutlet Diameter: 3.0\"\u003c\/div\u003e\n\u003c\/li\u003e\n\n\n\n \n\u003cli id=\"Included\"\u003e\n(1) Universal Oval Muffler\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\u003cli id=\"InstallGuide\"\u003e\n \n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n","brand":"DC Sports","offers":[{"title":"Default Title","offer_id":40963800793122,"sku":"DCMU-2503-ST","price":69.98,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/DCMU-2503-ST_32ux.jpg?v=1768848375"},{"product_id":"dc-sports-universal-round-muffler-25-inlet-25-outlet","title":"DC Sports Universal Round Muffler 2.5\" Inlet \/ 2.5\" Outlet","description":"\u003cul\u003e\n\u003cli\u003eProvides an Aggressive Exhaust Note Over OEM \u003c\/li\u003e\n\u003cli\u003eInlet 2.5\" (63mm), Outlet 2.5\" (63mm) \u003c\/li\u003e\n\u003cli\u003eBody Length 12\" (304mm), Total Length 17\" (431mm) \u003c\/li\u003e\n\u003cli\u003eBody Width 6\" (152mm) \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e  \u003cli\u003e\u003ca href=\"#TechnicalData\"\u003eTechnical Data\u003c\/a\u003e\u003c\/li\u003e   \u003cli\u003e\u003ca href=\"#Included\"\u003eIncluded\u003c\/a\u003e\u003c\/li\u003e  \u003cli\u003e\u003ca href=\"#InstallGuide\"\u003eInstall Guide\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003cdiv class=\"product-description\"\u003e\n\n  \u003ch3\u003eDC Sports Round Muffler, 2.5\" Inlet and 2.5\" Outlet\u003c\/h3\u003e\n\u003cp\u003eThe DC Sports Universal Round Performance Muffler (SKU: DCMU-250-R) is a straight shooter. If you want a 2.5 inch inlet muffler and a 2.5 inch outlet muffler that actually flows, this DC Sports 2.5 inch muffler checks the boxes without the fake hype. You get a straight through muffler core with a race inspired muffler layout, which means less restriction, quicker response, and a cleaner pull as you climb through the RPM.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    This one uses T-304 stainless, so it holds up to real weather and real miles. The DC Sports polished muffler shell comes in a high gloss muffler finish that stays looking sharp longer than the usual bargain stainless. More important, it gives you a deep sound muffler tone that stays usable. It sounds like an aggressive exhaust muffler when you lean into it, then it settles down when you cruise, assuming the rest of your system is reasonable.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Fitment wise, it’s a universal exhaust muffler with a compact universal round muffler body, so your exhaust shop can make it work on a ton of builds. That matters when you need to tuck it cleanly, keep ground clearance, or squeeze it into a tight rear section. As a performance muffler 2.5 inch option, it plays nicely with common 2.5 inch piping, and it’s an easy call for a simple vehicle exhaust upgrade.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Versus a factory suitcase muffler packed with chambers and baffles, this DC Sports round muffler drops a lot of the built in restriction. Tone and volume still depend on your combo, cat, resonator, turbo, and even cabin insulation all change the result. Expect the biggest difference when you get on it, especially up top, where the straight through design keeps the exhaust from feeling corked.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    We run these exact DC Sports mufflers on our own builds because they do what a performance muffler should do, flow, sound right, and last. If you want a DC Sports round muffler that looks clean, fits a bunch of custom setups, and acts like a proper race inspired muffler without turning your car into a tin can, this is the move.\n  \u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\n  \u003cul\u003e\n    \u003cli\u003eUniversal exhaust muffler for custom systems and swaps\u003c\/li\u003e\n    \u003cli\u003eStraight through muffler core for better flow and sharper throttle feel\u003c\/li\u003e\n    \u003cli\u003eT-304 muffler stainless construction for corrosion resistance\u003c\/li\u003e\n    \u003cli\u003eDC Sports polished muffler with a high gloss muffler exterior\u003c\/li\u003e\n    \u003cli\u003e2.5 inch inlet (63mm), true 2.5 inch inlet muffler sizing\u003c\/li\u003e\n    \u003cli\u003e2.5 inch outlet (63mm), true 2.5 inch outlet muffler sizing\u003c\/li\u003e\n    \u003cli\u003eBody length: 12 inches (304mm)\u003c\/li\u003e\n    \u003cli\u003eTotal length: 17 inches (431mm)\u003c\/li\u003e\n    \u003cli\u003eBody width: 6 inches (152mm)\u003c\/li\u003e\n    \u003cli\u003eDC Sports 2.5 inch muffler, DC Sports round muffler, DC Sports polished muffler, all in one simple package\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n \nUniversal\u003cul\u003e \u003c\/ul\u003e\n \n\u003c\/li\u003e\n\n\n\n\n\u003cli id=\"TechnicalData\"\u003e\nInlet Diameter: 2.5\"\u003cdiv\u003eOutlet Diameter: 2.5\"\u003c\/div\u003e\n\u003c\/li\u003e\n\n\n\n \n\u003cli id=\"Included\"\u003e\n(1) Universal Round Muffler\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\u003cli id=\"InstallGuide\"\u003e\n \n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n","brand":"DC Sports","offers":[{"title":"Default Title","offer_id":40963801514018,"sku":"DCMU-250-R","price":49.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/DCMU-250-R_bs0q.jpg?v=1768849302"},{"product_id":"dc-sports-universal-oval-muffler-25-inlet-25-outlet","title":"DC Sports Universal Oval Muffler 2.5\" Inlet 2.5\" Outlet","description":"\u003cul\u003e\n\u003cli\u003eIncreased Exhaust Flow Allows for Improved Performance \u003c\/li\u003e\n\u003cli\u003eProvides More Aggressive Exhaust Note Over OEM System\t \u003c\/li\u003e\n\u003cli\u003eInlet-2.5\" (63mm), Outlet-2.5\" (63mm)\t \u003c\/li\u003e\n\u003cli\u003eBody Length- 12\" (304mm), Total Length- 17\" (431mm) \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e  \u003cli\u003e\u003ca href=\"#TechnicalData\"\u003eTechnical Data\u003c\/a\u003e\u003c\/li\u003e   \u003cli\u003e\u003ca href=\"#Included\"\u003eIncluded\u003c\/a\u003e\u003c\/li\u003e  \u003cli\u003e\u003ca href=\"#InstallGuide\"\u003eInstall Guide\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003ch3\u003eDC Sports DCMU-250-ST Universal Oval Muffler - 2.5\" Inlet \/ 2.5\" Outlet\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eT-304 Stainless Steel | Straight-Through Core | 5\" x 8\" Oval Body | Weld-In Universal Fit\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\nYou've already decided you want a 2.5\" muffler. Now you're figuring out which one is actually worth buying. Here's where the DC Sports DCMU-250-ST lands: it's a straight-through oval can built from T-304 stainless steel, sized at 2.5\" in and 2.5\" out, with a 5\" x 6\" wide x 8\" long body that tucks cleanly under most compact and mid-size cars. It's not the cheapest option on the market, and it's not trying to be. It's a well-built, honest performer that earns its place on street builds, swaps, and budget track setups alike.\n\u003c\/p\u003e\n\n\u003ch4\u003eHow it compares to your OEM muffler\u003c\/h4\u003e\n\u003cp\u003e\nMost factory mufflers use a chambered or baffled design. That keeps them quiet, but it also creates backpressure and chokes exhaust flow - especially on modified engines that are pushing more than stock power levels. The DCMU-250-ST uses a perforated straight-through core with acoustic packing around it. Flow restriction drops noticeably compared to OEM, and the tone shifts from a muted, almost hollow stock sound to something deeper and more defined.\n\u003c\/p\u003e\n\u003cp\u003e\nIt won't turn your Honda into a fire-breathing track weapon on its own - no muffler will. But paired with the right header and midpipe, you'll feel the difference at the top of the rev range, and you'll definitely hear it every time you get on the throttle.\n\u003c\/p\u003e\n\n\u003ch4\u003eTechnical specs in plain English\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInlet:\u003c\/strong\u003e 2.5\" (63mm) - matches the most common aftermarket piping diameter for 4-cylinder builds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutlet:\u003c\/strong\u003e 2.5\" (63mm) - no reducer, no restriction at the tip exit\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody dimensions:\u003c\/strong\u003e 5\" wide x 6\" tall x 8\" long oval canister\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody length:\u003c\/strong\u003e 12\" (304mm) - the actual muffler can, not counting the inlet\/outlet stubs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTotal length:\u003c\/strong\u003e 17\" (431mm) - inlet stub to outlet stub, tip to tip\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e T-304 stainless steel throughout - body, core, and tips\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e High-gloss polished exterior\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCore design:\u003c\/strong\u003e Straight-through perforated core with sound-dampening packing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e DCMU-250-ST\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\nT-304 is worth calling out specifically because a lot of budget mufflers use aluminized mild steel, which is fine until it sees road salt, moisture, or heat cycles over a few years. T-304 stainless handles all of that without the surface rust and pitting that kills mild steel cans. If you're building something you plan to keep, the material matters.\n\u003c\/p\u003e\n\n\u003ch4\u003eSound - what to actually expect\u003c\/h4\u003e\n\u003cp\u003e\nThe DCMU-250-ST is louder than stock. That's the point. But it sits in a useful middle ground - meaningfully louder than OEM, noticeably quieter and cleaner than a straight pipe. On a 4-cylinder, it produces a deep, full tone rather than the buzzy rasp you get from cheaper chambered cans or high-pitched straight pipes.\n\u003c\/p\u003e\n\u003cp\u003e\nHighway drone depends heavily on your resonator setup and total system length. With a quality resonator upstream, most builders report comfortable highway cruising. Skip the resonator on a short system and you may get some drone in the 2,000-3,000 RPM cruise range. If drone is a concern, mention it to your exhaust shop and have them position this can with resonator placement in mind.\n\u003c\/p\u003e\n\u003cp\u003e\nComparable sound character to the Vibrant 1141 and similar straight-through oval cans in this price range. Slightly deeper than most chambered alternatives at the same price point.\n\u003c\/p\u003e\n\n\u003ch4\u003eInstallation - what the job actually involves\u003c\/h4\u003e\n\u003cp\u003e\nThis is a weld-in universal muffler. There is no bolt-on bracket, no slip-fit clamp connection, and no vehicle-specific hangers included. You need to weld it into your custom exhaust system or have an exhaust shop do it. That is standard for this category of part.\n\u003c\/p\u003e\n\u003cp\u003e\nFor most builds the process is straightforward: cut your existing pipe at the muffler location, slide the DCMU-250-ST in-line, tack weld it, confirm clearance and hanger position, then finish weld. If you're starting a system from scratch, your exhaust fabricator will integrate it during the build. Either way, budget for 1-2 hours of shop time if you're not doing it yourself.\n\u003c\/p\u003e\n\u003cp\u003e\nThe 5\" x 8\" body clears most Honda, Acura, and similar compact chassis with room to spare. If your car has a tight tunnel or rear subframe, measure your available vertical clearance before ordering - you want at least 6\" of clearance to mount this without it contacting the undercarriage.\n\u003c\/p\u003e\n\n\u003ch4\u003eWho this muffler is built for\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eHonda and Acura builds running 2.5\" custom exhaust - B-series, K-series, H-series swaps\u003c\/li\u003e\n  \u003cli\u003eAny 4-cylinder project car where you need real flow improvement and a cleaner tone than straight pipe\u003c\/li\u003e\n  \u003cli\u003eStreet\/track dual-purpose cars that need to be livable daily but have a presence when you get on it\u003c\/li\u003e\n  \u003cli\u003eBudget builds where you want stainless durability without paying for a brand-name markup\u003c\/li\u003e\n  \u003cli\u003eOlder daily drivers replacing a rusted-out OEM muffler and upgrading at the same time\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\nIf you're looking for a bolt-on exhaust that fits without fabrication, this is not the right part. If you want a luxury-quiet exhaust or near-stock sound levels, look at a chambered design instead. This muffler is for builders who know what they're building and want a reliable, honest piece to work with.\n\u003c\/p\u003e\n\n\u003ch4\u003eWhat's included\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e(1) DC Sports DCMU-250-ST universal oval muffler - T-304 stainless steel, 2.5\" inlet \/ 2.5\" outlet, high-gloss finish\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eFAQ\u003c\/h4\u003e\n\u003cdl\u003e\n  \u003cdt\u003e\u003cstrong\u003eWill this fit my specific car without modifications?\u003c\/strong\u003e\u003c\/dt\u003e\n  \u003cdd\u003eThis is a universal muffler - it does not bolt onto any specific vehicle. It requires welding into a custom 2.5\" exhaust system. It has no vehicle-specific hangers or clamps. If you need a direct bolt-on replacement, this is not the right part for your application.\u003c\/dd\u003e\n\n  \u003cdt\u003e\u003cstrong\u003eDoes installation require welding?\u003c\/strong\u003e\u003c\/dt\u003e\n  \u003cdd\u003eYes. The DCMU-250-ST is designed to be welded in-line with a 2.5\" custom exhaust. It is not a clamp-on or slip-fit design. Any exhaust shop can handle this install - expect 1-2 hours of labor depending on your existing system.\u003c\/dd\u003e\n\n  \u003cdt\u003e\u003cstrong\u003eHow loud is it, and will it drone on the highway?\u003c\/strong\u003e\u003c\/dt\u003e\n  \u003cdd\u003eIt's louder than stock - a deep, full tone rather than a raspy or tinny sound. Highway drone varies based on your resonator placement and total system length. Running a resonator upstream significantly reduces cruise drone. Without a resonator on a short system, some drone in the 2,000-3,000 RPM range is possible.\u003c\/dd\u003e\n\n  \u003cdt\u003e\u003cstrong\u003eWhat are the exact body dimensions, including width?\u003c\/strong\u003e\u003c\/dt\u003e\n  \u003cdd\u003eThe muffler body measures 5\" wide x 6\" tall x 8\" long (oval canister only). Total length including inlet and outlet stubs is 17\" (431mm). Body length alone is 12\" (304mm). Inlet and outlet are both 2.5\" (63mm) diameter.\u003c\/dd\u003e\n\n  \u003cdt\u003e\u003cstrong\u003eIs this muffler street legal?\u003c\/strong\u003e\u003c\/dt\u003e\n  \u003cdd\u003eThe DCMU-250-ST itself has no catalytic converter or emissions equipment - it is a muffler only. Street legality depends on your local noise ordinance and emissions laws. In most U.S. states it is legal for off-road or modified street use as long as your full system retains catalytic converter(s) where required. Check your state and local regulations before installing on a street-driven vehicle.\u003c\/dd\u003e\n\n  \u003cdt\u003e\u003cstrong\u003eWhat brands and pipe sizes does this work with?\u003c\/strong\u003e\u003c\/dt\u003e\n  \u003cdd\u003eIt works with any 2.5\" (63mm) exhaust piping regardless of brand. Common fitments include Honda and Acura builds using B-series, K-series, or H-series engines with 2.5\" custom exhaust, as well as any other 4-cylinder or small 6-cylinder application running 2.5\" tubing.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n \u003cp\u003e\u003cstrong\u003eUniversal fitment - weld-in installation required.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis muffler is not vehicle-specific and does not include bolt-on hardware or vehicle-specific hangers. It is designed to be welded in-line with any 2.5\" (63mm) custom exhaust system.\u003c\/p\u003e\n\u003cp\u003eCommon applications include:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHonda and Acura B-series, K-series, and H-series builds with 2.5\" custom exhaust\u003c\/li\u003e\n  \u003cli\u003eAny 4-cylinder or small-displacement engine running 2.5\" aftermarket piping\u003c\/li\u003e\n  \u003cli\u003eCustom street, track, drift, and swap builds where fabrication is already part of the project\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eVerify at least 6\" of vertical undercarriage clearance at the muffler mounting location before ordering. The oval body measures 5\" wide x 6\" tall x 8\" long.\u003c\/p\u003e \n\u003c\/li\u003e\n\n\n\n\n\u003cli id=\"TechnicalData\"\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e DCMU-250-ST\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInlet Diameter:\u003c\/strong\u003e 2.5\" (63mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutlet Diameter:\u003c\/strong\u003e 2.5\" (63mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Width:\u003c\/strong\u003e 5\" (127mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Height:\u003c\/strong\u003e 6\" (152mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Length:\u003c\/strong\u003e 8\" (203mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length (tip to tip):\u003c\/strong\u003e 17\" (431mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCanister Length:\u003c\/strong\u003e 12\" (304mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCore Design:\u003c\/strong\u003e Straight-through perforated core\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e T-304 stainless steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e High-gloss polished\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInlet Position:\u003c\/strong\u003e Center\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutlet Position:\u003c\/strong\u003e Center\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInstallation Method:\u003c\/strong\u003e Weld-in (welding required)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Universal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\n\n \n\u003cli id=\"Included\"\u003e\n\u003cul\u003e\n  \u003cli\u003e(1) DC Sports DCMU-250-ST universal oval muffler - T-304 stainless steel, 2.5\" inlet \/ 2.5\" outlet, high-gloss polished finish\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNote: No mounting hardware, hangers, or clamps are included. Welding and fabrication supplies are not included.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\u003cli id=\"InstallGuide\"\u003e\n \n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n","brand":"DC Sports","offers":[{"title":"Default Title","offer_id":40963801677858,"sku":"DCMU-250-ST","price":69.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/DCMU-250-ST_ly2j.jpg?v=1775739931"},{"product_id":"dc-sports-universal-round-muffler-3-inlet-4-outlet","title":"DC Sports Universal Round Muffler 3\" Inlet \/ 4\" Outlet","description":"\u003cul\u003e\n\u003cli\u003eProvides an Aggressive Exhaust Note Over OEM \u003c\/li\u003e\n\u003cli\u003eInlet 3\" (76 mm), Outlet 4\" (101mm) \u003c\/li\u003e\n\u003cli\u003eBody Length 12\" (304mm), Total Length 17\" (431mm) \u003c\/li\u003e\n\u003cli\u003eBody Width 6\" (152mm) \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e  \u003cli\u003e\u003ca href=\"#TechnicalData\"\u003eTechnical Data\u003c\/a\u003e\u003c\/li\u003e   \u003cli\u003e\u003ca href=\"#Included\"\u003eIncluded\u003c\/a\u003e\u003c\/li\u003e  \u003cli\u003e\u003ca href=\"#InstallGuide\"\u003eInstall Guide\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003ch3\u003eDC Sports Universal Round Muffler, 3\" Inlet \/ 4\" Outlet\u003c\/h3\u003e\n\n\u003cp\u003e\n  If your current exhaust feels choked and you want real flow without going full straight pipe,\n  the DC Sports Universal Round Muffler is an easy upgrade. This muffler runs a\n  3-inch inlet and a 4-inch outlet with a true straight-through core, so exhaust\n  gas moves freely instead of fighting baffles. That means less backpressure, stronger pull at\n  higher RPM, and sharper throttle response from a muffler that behaves like a real performance\n  part.\n\u003c\/p\u003e\n\n\u003cp\u003e\n  Sound is exactly what most enthusiasts are after. This DC Sports round muffler delivers a deeper,\n  more aggressive exhaust note without the thin, raspy edge that cheaper mufflers tend to produce.\n  It will be louder than stock, but the tone stays smooth when the rest of the exhaust system is\n  set up correctly. Built from T-304 stainless steel, the polished round shell\n  handles heat cycles, weather, and daily driving without turning into a rusty eyesore.\n\u003c\/p\u003e\n\n\u003cp\u003e\n  The round body design works well in chassis with enough clearance and keeps the layout simple\n  for custom exhaust work. This DC Sports universal muffler is a good match for\n  naturally aspirated builds and turbo setups that need a high-flow exhaust muffler to keep drive\n  pressure under control. If you are already committed to 3-inch piping and want a bold outlet\n  look with real flow behind it, this muffler gets the job done.\n\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eDC Sports universal round performance muffler\u003c\/li\u003e\n  \u003cli\u003e3-inch inlet and 4-inch outlet for high-flow exhaust systems\u003c\/li\u003e\n  \u003cli\u003eStraight-through core reduces backpressure and improves exhaust flow\u003c\/li\u003e\n  \u003cli\u003eDeep, aggressive exhaust tone without harsh rasp\u003c\/li\u003e\n  \u003cli\u003eT-304 stainless steel construction for durability and corrosion resistance\u003c\/li\u003e\n  \u003cli\u003ePolished round body for a clean, performance-focused appearance\u003c\/li\u003e\n  \u003cli\u003eIdeal for custom exhaust builds using 3-inch piping\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n \nUniversal\u003cul\u003e \u003c\/ul\u003e\n \n\u003c\/li\u003e\n\n\n\n\n\u003cli id=\"TechnicalData\"\u003e\nInlet Diameter: 3.0\"\u003cdiv\u003eOutlet Diameter: 4.0\"\u003c\/div\u003e\n\u003c\/li\u003e\n\n\n\n \n\u003cli id=\"Included\"\u003e\n(1) Universal Round Muffler\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\u003cli id=\"InstallGuide\"\u003e\n \n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n","brand":"DC Sports","offers":[{"title":"Default Title","offer_id":40963802398754,"sku":"DCMU-3004-R","price":49.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/DCMU-3004-R_7jxb.jpg?v=1768856379"},{"product_id":"dc-sports-universal-oval-muffler-3-inlet-4-outlet","title":"DC Sports Universal Oval Muffler 3\" Inlet \/ 4\" Outlet","description":"\u003cul\u003e\n\u003cli\u003eProvides an Aggressive Exhaust Note Over OEM \u003c\/li\u003e\n\u003cli\u003eInlet 3\" (76 mm), Outlet 4\" (101mm) \u003c\/li\u003e\n\u003cli\u003eBody Length 12\" (304mm), Total Length 17\" (431mm) \u003c\/li\u003e\n\u003cli\u003e Body Width 5\" x 8\" Oval  \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e  \u003cli\u003e\u003ca href=\"#TechnicalData\"\u003eTechnical Data\u003c\/a\u003e\u003c\/li\u003e   \u003cli\u003e\u003ca href=\"#Included\"\u003eIncluded\u003c\/a\u003e\u003c\/li\u003e  \u003cli\u003e\u003ca href=\"#InstallGuide\"\u003eInstall Guide\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003ch3\u003eDC Sports Universal Oval Muffler, 3\" Inlet \/ 4\" Outlet\u003c\/h3\u003e\n\n\u003cp\u003e\n  If your current exhaust feels choked and you want real flow without going full straight pipe,\n  the DC Sports Universal Oval Muffler is a solid fix. This setup uses a\n  3-inch inlet and a 4-inch outlet with a true straight-through core, so exhaust\n  gas moves freely instead of fighting baffles. That means less backpressure, cleaner pull at\n  higher RPM, and better throttle response from a muffler that actually works like a performance\n  part.\n\u003c\/p\u003e\n\n\u003cp\u003e\n  Sound wise, this DC Sports oval muffler lands where most enthusiasts want it. You get a deeper,\n  more aggressive exhaust note without the thin rasp that gives aftermarket mufflers a bad name.\n  It is louder than stock, no surprises there, but the tone stays smooth and controlled when the\n  rest of the system makes sense. Built from T-304 stainless steel, the polished\n  oval shell holds up to heat cycles, weather, and daily driving without turning into a rusty mess\n  after a couple seasons.\n\u003c\/p\u003e\n\n\u003cp\u003e\n  The oval body design makes fitment easier than a large round can, especially on cars with tight\n  tunnel space or rear suspension that eats up clearance. This DC Sports universal muffler\n  works well on naturally aspirated street cars and turbo builds that need a high-flow exhaust\n  muffler to keep drive pressure in check. If you are already running 3-inch piping and want a\n  performance muffler with a bit more outlet presence, this one fits the bill.\n\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eDC Sports universal oval performance muffler\u003c\/li\u003e\n  \u003cli\u003e3-inch inlet and 4-inch outlet for high-flow exhaust systems\u003c\/li\u003e\n  \u003cli\u003eStraight-through core reduces backpressure and improves exhaust flow\u003c\/li\u003e\n  \u003cli\u003eDeeper exhaust tone without harsh rasp\u003c\/li\u003e\n  \u003cli\u003eT-304 stainless steel construction for durability and corrosion resistance\u003c\/li\u003e\n  \u003cli\u003ePolished oval body for improved clearance and easy fitment\u003c\/li\u003e\n  \u003cli\u003eIdeal for custom exhaust builds using 3-inch piping\u003c\/li\u003e\n\u003c\/ul\u003e\n\n  \n\n\n \n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n \nUniversal\u003cul\u003e \u003c\/ul\u003e\n \n\u003c\/li\u003e\n\n\n\n\n\u003cli id=\"TechnicalData\"\u003e\nInlet Diameter: 3.0\"\u003cdiv\u003eOutlet Diameter: 4.0\"\u003c\/div\u003e\n\u003c\/li\u003e\n\n\n\n \n\u003cli id=\"Included\"\u003e\n(1) Universal Oval Muffler\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\u003cli id=\"InstallGuide\"\u003e\n \n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n","brand":"DC Sports","offers":[{"title":"Default Title","offer_id":40963802431522,"sku":"DCMU-3004-ST","price":69.98,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/DCMU-3004-ST_xbxq.jpg?v=1768855569"},{"product_id":"honda-k-series-exhaust-manifold-gasket-18115-pnb-003","title":"Honda K Series Exhaust Manifold Gasket 18115-PNB-003","description":"\u003cul\u003e\n\u003cli\u003eFits Most K20 \u0026amp; K24 Engines \u003c\/li\u003e\n\u003cli\u003eGenuine Honda Product \u003c\/li\u003e\n\u003cli\u003eDurable To High Pressure And Temperatures \u003c\/li\u003e\n\u003cli\u003eProtects Against Exhaust Leaks \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e   \u003cli\u003e\u003ca href=\"#Included\"\u003eIncluded\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003ch3\u003eGenuine Honda K Series Exhaust Manifold Gasket 18115-PNB-003\u003c\/h3\u003e\n\u003cp\u003eStop exhaust leaks before they steal power. Swap in this genuine Honda K Series exhaust manifold gasket 18115-PNB-003 and give your K-powered Acura or Honda the airtight seal it was born with. Honda’s multi-layer stainless-steel construction shrugs off extreme cylinder-head temperatures, turbo heat, and countless heat cycles without crushing or flaking like cheap paper composites. The precision-stamped fire rings match the factory port shape perfectly, so whether you’re bolting stock headers back on after a clutch job or installing aftermarket headers that retain the OEM flange pattern, you’ll torque down once and drive worry-free.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch4\u003eFeatures\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Honda quality—direct replacement for the factory K-series gasket\u003c\/li\u003e\n    \u003cli\u003eMulti-layer stainless steel (MLS) resists warping and blow-outs up to 1600 °F\u003c\/li\u003e\n    \u003cli\u003eRestores lost power, fuel economy, and keeps that raspy leak out of your cabin\u003c\/li\u003e\n    \u003cli\u003eFits K20\/K24 platforms found in 2002-06 RSX, 2004-08 TSX, 2003-07 Accord 2.4L, 2002-11 Civic Si \u0026amp; select trims, 2002-06 CR-V, and 2003-11 Element\u003c\/li\u003e\n    \u003cli\u003eIdeal for daily drivers, track cars, or boosted builds that demand an iron-clad seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\n\u003ch4\u003eInstallation Snapshot:\u003c\/h4\u003e\n\u003cp\u003eDIY-friendly, 30–45 min, gasket only (reuse factory studs\/nuts), no tune or cutting required.\u003c\/p\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n 2004-2008 Acura TSX\u003cdiv\u003e2002-2006 Acura RSX\u003c\/div\u003e\n\u003cdiv\u003e2003-2007 Honda Accord\u003c\/div\u003e\n\u003cdiv\u003e2002-2011 Honda Civic Si\u003c\/div\u003e\n\u003cdiv\u003e2002-2006 Honda CRV\u003c\/div\u003e\n\u003cdiv\u003e2003-2011 Honda Element\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e \n\u003c\/li\u003e\n\n\n\n\n\n\n \n\u003cli id=\"Included\"\u003e\n(1) Exhaust Manifold Gasket\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\u003c\/ul\u003e\n","brand":"Honda","offers":[{"title":"Default Title","offer_id":41476907958306,"sku":"OHA-18115-PNB-003","price":23.67,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/OHA-18115-PNB-003_1.jpg?v=1751058526"},{"product_id":"skunk2-alpha-series-header-k20z3-06-11-civic-si","title":"Skunk2 Alpha Series Header for 06-11 Civic Si","description":"\u003cul\u003e\n\u003cli\u003eTri-Y, 4-2-1 Header Design \u003c\/li\u003e\n\u003cli\u003eK24 Swap Compatible \u003c\/li\u003e\n\u003cli\u003eT-304 Stainless Steel Construction \u003c\/li\u003e\n\u003cli\u003eImproved Mid-Range Power \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e  \u003cli\u003e\u003ca href=\"#TechnicalData\"\u003eTechnical Data\u003c\/a\u003e\u003c\/li\u003e   \u003cli\u003e\u003ca href=\"#Included\"\u003eIncluded\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003ch3\u003eSkunk2 Alpha Series Header - 2006-2011 Honda Civic Si \/ K20Z3 \u0026amp; K24 Swap\u003c\/h3\u003e\n\n\u003cp\u003eWant more power from your 8th gen Civic Si? The Skunk2 Alpha Series header replaces your factory header with a 4-2-1 Tri-Y equal-length header. Your factory header's got short, unequal-length primaries and a restrictive cat. The Skunk2 header's got long, equal-length primaries and a 2.5\" collector with no cat. That means better exhaust flow, which means more power everywhere in the RPM range. You'll feel the difference in mid-range torque and throttle response. If you're modding your K20Z3 Civic Si or you're doing a K24 swap, you need a header.\u003c\/p\u003e\n\n\u003ch4\u003eHere's Why You Need a Header\u003c\/h4\u003e\n\n\u003cp\u003eYour factory header's restrictive. The primaries are short and unequal length, which means exhaust pulses interfere with each other and you lose power. The factory cat's even more restrictive. It chokes your exhaust flow, especially at high RPM. When you replace your factory header with the Skunk2 Alpha header, you're getting longer, equal-length primaries that reduce exhaust pulse interference. The 4-2-1 Tri-Y design merges the primaries in pairs, which smooths out your power curve and gives you more mid-range torque. The 2.5\" collector flows way more exhaust than your factory header, so you're making more power at high RPM too.\u003c\/p\u003e\n\n\u003ch4\u003e4-2-1 Tri-Y Design with Equal-Length Primaries\u003c\/h4\u003e\n\n\u003cp\u003eThe Skunk2 Alpha header uses a 4-2-1 Tri-Y design. That means your four exhaust ports merge into two collectors, then those two collectors merge into one final collector. The primaries are equal length, which means exhaust pulses from each cylinder arrive at the collector at the same time. That reduces interference and makes your exhaust scavenging more efficient. You're pulling more exhaust out of your cylinders, which means more fresh air getting in on the next intake stroke. That's more power.\u003c\/p\u003e\n\n\u003ch4\u003eWorks with K20Z3 and K24 Swaps\u003c\/h4\u003e\n\n\u003cp\u003eThe Skunk2 Alpha header fits 8th gen Civic Si with the factory K20Z3 engine. It also fits K24 swaps if you're swapping a K24 into your 8th gen Civic. The header works with stock engine mounts and a CR-V rear engine mount. If you're doing a K24 swap, you don't need custom engine mounts to make this header fit. It bolts on.\u003c\/p\u003e\n\n\u003ch4\u003e2-Bolt Flange - Check Your Exhaust\u003c\/h4\u003e\n\n\u003cp\u003eThe Skunk2 header uses a 2-bolt flange at the collector. Make sure your exhaust system or test pipe uses a 2-bolt flange. If your exhaust has a 3-bolt flange (like some aftermarket exhausts do), you'll need a 2-bolt to 3-bolt adapter to connect them. Don't try to force a 3-bolt exhaust onto a 2-bolt header. You'll crack your flange or leak exhaust. Get the right adapter or get an exhaust with a 2-bolt flange.\u003c\/p\u003e\n\n\u003ch4\u003eRace-Only - No Cat\u003c\/h4\u003e\n\n\u003cp\u003eThis header's race-only. It eliminates your catalytic converter. That means it's not legal for street use in California or any state with emissions testing. If you're in a state with no emissions testing and you don't care about passing smog, you can run it on the street. If you're in California or you need to pass emissions, don't buy this header. It'll fail emissions and you'll get a ticket. This is a race header for off-road use.\u003c\/p\u003e\n\n\u003ch4\u003eWhat You Get\u003c\/h4\u003e\n\n\u003cul\u003e\n  \u003cli\u003eSkunk2 Alpha Series 4-2-1 header\u003c\/li\u003e\n  \u003cli\u003eEqual-length Tri-Y primary design\u003c\/li\u003e\n  \u003cli\u003e2.5\" collector outlet with 2-bolt flange\u003c\/li\u003e\n  \u003cli\u003eNo catalytic converter (race-only)\u003c\/li\u003e\n  \u003cli\u003eCompatible with K20Z3 and K24 engines\u003c\/li\u003e\n  \u003cli\u003eWorks with stock engine mounts and CR-V rear mount\u003c\/li\u003e\n  \u003cli\u003eAll mounting hardware and gaskets included\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eFits Your Car\u003c\/h4\u003e\n\n\u003cul\u003e\n  \u003cli\u003e2006-2011 Honda Civic Si (8th gen, K20Z3)\u003c\/li\u003e\n  \u003cli\u003e2006-2011 Acura CSX (K20Z3)\u003c\/li\u003e\n  \u003cli\u003e2006-2011 Honda Civic Si with K24 swap\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eCompatible Engines\u003c\/h4\u003e\n\n\u003cul\u003e\n  \u003cli\u003eK20Z3 (2006-2011 Civic Si, Acura CSX)\u003c\/li\u003e\n  \u003cli\u003eK24 (swapped into 8th gen Civic Si)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e This header's for off-road and race use only. It eliminates your catalytic converter, so it's not legal for street use in states with emissions testing. You'll fail emissions if you try to smog your car with this header. If you're in California, don't buy this header unless it's going on a dedicated race car that's never driven on the street. The header uses a 2-bolt flange. Make sure your exhaust or test pipe uses a 2-bolt flange. If your exhaust has a 3-bolt flange, you'll need a 2-bolt to 3-bolt adapter. Don't force a mismatched flange connection. You'll crack the flange or get exhaust leaks. Get your car tuned after you install this header. Your ECU's not programmed for the increased exhaust flow, so you'll need to adjust your fuel and ignition maps to make proper power.\u003c\/p\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n 2006-2011 Acura CSX\u003cdiv\u003e2006-2011 Honda Civic Si\u003c\/div\u003e \n\u003c\/li\u003e\n\n\n\n\n\u003cli id=\"TechnicalData\"\u003e\nT-304 Stainless Steel\u003cdiv\u003eK24 Compatible\u003c\/div\u003e\n\u003cdiv\u003eTri-Y 4-2-1 Design\u003c\/div\u003e\n\u003c\/li\u003e\n\n\n\n \n\u003cli id=\"Included\"\u003e\n(1) Header\u003cdiv\u003e(1)\n\nAdapter Flange\u003c\/div\u003e\n\u003cdiv\u003e(1) Donut Gasket\u003c\/div\u003e\n\u003cdiv\u003e(1) Exhaust Hanger Mounting Bracket\u003c\/div\u003e\n\u003cdiv\u003e(1) O2 Sensor Bung (Threat Pitch: M18x1.5)\u003c\/div\u003e\n\u003cdiv\u003e(1) O2 Sensor Extension Wire\u003c\/div\u003e\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\u003c\/ul\u003e\n","brand":"Skunk2 Racing","offers":[{"title":"Default Title","offer_id":43109428133922,"sku":"SK2-412-05-1930","price":543.73,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/SK2-412-05-1930_1crop.jpg?v=1756216137"},{"product_id":"skunk2-mega-power-rr-exhaust-06-11-civic-si","title":"Skunk2 Mega Power RR Exhaust (06-11 Civic Si)","description":"\u003cul\u003e\n\u003cli\u003e3 Inch Diameter Piping \u003c\/li\u003e\n\u003cli\u003eIdeal for Heavily Modified Builds \u003c\/li\u003e\n\u003cli\u003eT-304 Stainless Steel Construction \u003c\/li\u003e\n\u003cli\u003eOptions for 2 \u0026amp; 4 Door Civic Si Chassis \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e  \u003cli\u003e\u003ca href=\"#TechnicalData\"\u003eTechnical Data\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\nUpgrade your 2006-2011 Honda Civic Si or 2007-2010 Acura CSX Type S with the Skunk2 MegaPower RR Exhaust System, engineered for maximum performance. Designed to meet the demands of high-powered, heavily modified naturally aspirated or turbocharged engines, this exhaust system features 76mm T-304 stainless steel construction, robotically TIG welded joints, and CNC mandrel-bent tubing for a perfect fit. Whether you have a 2-door or 4-door model, this exhaust delivers improved flow and noticeable horsepower gains.\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eInspired by Japanese Super N1 styling, the MegaPower RR Exhaust boasts oversized piping for maximum airflow, resulting in a powerful exhaust note that turns heads. Built for serious performance enthusiasts, this system enhances exhaust gas flow with precision and comes complete with a racing-style straight-through muffler, resonator, and a polished 110mm tip. Every exhaust is stamped with Skunk2’s MegaPower badge and includes a removable silencer and all necessary hardware.  \u003c\/div\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n 2007-2010 Acura CSX Type S\u003cdiv\u003e\u003cspan style=\"background-color: var(--rz-editor-content-background-color); color: var(--bs-body-color); font-size: var(--bs-body-font-size); font-weight: var(--bs-body-font-weight); text-align: var(--bs-body-text-align);\"\u003e2006-2011 Honda Civic Si\u003c\/span\u003e\u003c\/div\u003e \n\u003c\/li\u003e\n\n\n\n\n\u003cli id=\"TechnicalData\"\u003e\nT-304 Stainles Steel\u003cdiv\u003e3\" Diameter Piping\u003c\/div\u003e\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\u003c\/ul\u003e\n","brand":"Skunk2 Racing","offers":[{"title":"Coupe (2 Dr)","offer_id":43138698379298,"sku":"SK2-413-05-6025","price":764.7,"currency_code":"USD","in_stock":false},{"title":"Sedan (4 Dr)","offer_id":43138698444834,"sku":"SK2-413-05-6030","price":764.7,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/SK2-413-05-6025-1crop.png?v=1727288757"},{"product_id":"apex-world-sport-3-exhaust-07-11-civic-si-sedan","title":"APEXi World Sport 3 Exhaust (07-11 Civic Si Sedan)","description":"\u003cul\u003e\n\u003cli\u003eHigh-Grade Stainless Steel Construction \u003c\/li\u003e\n\u003cli\u003eCompatible with Civic Si Sedan and CSX Type S Only \u003c\/li\u003e\n\u003cli\u003e115mm Dual Walled, Single Exit Tip \u003c\/li\u003e\n\u003cli\u003eMid To High-End Power Improvement \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e  \u003cli\u003e\u003ca href=\"#TechnicalData\"\u003eTechnical Data\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\nThe APEXi World Sport 3 (WS3) Dual Exhaust for the 2007-2011 Honda Civic Si Sedan (FA5) and 2007-2010 Acura CSX Type S delivers a perfect balance of enhanced performance and refined sound. Built from high-quality SUS304 stainless steel, this exhaust system features 60.5mm mandrel bent piping that maximizes exhaust flow and efficiency. With its dual 115mm polished tips and elegant design, the WS3 adds a sleek, sporty look to your vehicle while boosting overall power and throttle response.\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eDesigned for daily driving, the WS3 is ideal for enthusiasts who want performance without overwhelming noise. It improves mid to high-end power, providing smooth acceleration while maintaining a comfortable, subtle exhaust tone. Whether you're seeking more performance or a cleaner aesthetic, the WS3 Dual Exhaust offers the perfect combination of functionality, style, and sound for your Civic Si or Acura CSX Type S. Complete with all necessary installation hardware, this system is built for precision and durability.  \u003c\/div\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n 2007-2010 Acura CSX Type S\u003cdiv\u003e2007-2011 Honda Civic Si (Sedan Only)\u003c\/div\u003e \n\u003c\/li\u003e\n\n\n\n\n\u003cli id=\"TechnicalData\"\u003e\nPiping Diameter: 60.5mm\u003cdiv\u003eT\u003cspan style=\"background-color: var(--rz-editor-content-background-color); color: var(--bs-body-color); font-size: var(--bs-body-font-size); font-weight: var(--bs-body-font-weight); text-align: var(--bs-body-text-align);\"\u003eip Diameter: 115mm\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"background-color: var(--rz-editor-content-background-color); color: var(--bs-body-color); font-size: var(--bs-body-font-size); font-weight: var(--bs-body-font-weight); text-align: var(--bs-body-text-align);\"\u003ePieces: 3\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"background-color: var(--rz-editor-content-background-color); color: var(--bs-body-color); font-size: var(--bs-body-font-size); font-weight: var(--bs-body-font-weight); text-align: var(--bs-body-text-align);\"\u003eExhaust Tip Style: Oval-Dual wall rolled, Angle cut\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"background-color: var(--rz-editor-content-background-color); color: var(--bs-body-color); font-size: var(--bs-body-font-size); font-weight: var(--bs-body-font-weight); text-align: var(--bs-body-text-align);\"\u003ePiping Material: SUS304 Stainless Steel  \u003c\/span\u003e\u003c\/div\u003e\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\u003c\/ul\u003e\n","brand":"APEXi","offers":[{"title":"Default Title","offer_id":43156787691554,"sku":"APX-WS3-01-07","price":1139.05,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/APX-WS3-01-07-1.jpg?v=1727898433"},{"product_id":"full-race-8th-gen-civic-si-catback-exhaust-fg2-fa5-06-11-civic-si","title":"Full Race Catback Exhaust for 8th Gen 06-11 Civic Si","description":"\u003cul\u003e\n\u003cli\u003eHigh-Quality T304 Stainless Steel \u003c\/li\u003e\n\u003cli\u003eCoupe and Sedan Fitments Available \u003c\/li\u003e\n\u003cli\u003eComes in 2.5\" or 3.0\" Sizes \u003c\/li\u003e\n\u003cli\u003eV-Band Flanges For Easy Installation \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e  \u003cli\u003e\u003ca href=\"#TechnicalData\"\u003eTechnical Data\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003ch3\u003eFull-Race 8th Gen Honda Civic Si Catback Exhaust System (FG2 \/ FA5)\u003c\/h3\u003e\n\n\u003cp\u003e\nIf you want a legit 2006 Civic Si exhaust that fits right and flows, this Full Race Civic Si exhaust is the move for FG2 coupe and FA5 sedan cars. It’s a Civic Si stainless catback built from T304 stainless and finished as a Full Race polished exhaust, so it holds up to years of heat cycles and still looks good when you’re under the car. No fluff, it’s a purpose built 8th gen Civic Si catback for people who actually drive their cars hard.\n\u003c\/p\u003e\n\n\u003cp\u003e\nFull-Race uses a straight through layout and V band connections, which means less restriction and fewer annoying leaks compared to slip fit joints. On a stock or lightly modded Civic Si VTEC exhaust setup, you’ll feel the better throttle response up top, and once you go forced induction it matters even more. This system works as a Civic Si turbo exhaust or supercharged setup because it helps drop backpressure, so your turbo spools sooner and carries power longer. You can choose a Civic Si 2.5 inch exhaust flange or step up to a Civic Si 3.0 inch catback flange depending on your header or downpipe. If you’re shopping for a 2011 Civic Si catback, this covers that too.\n\u003c\/p\u003e\n\n\u003cp\u003e\nFitment stays simple. This Honda Civic Si performance exhaust bolts to aftermarket race headers, Full-Race turbo downpipes, or you can adapt it to OEM style setups with the right reducer. Sound wise, it stays clean and controlled, not the raspy tin can vibe. You still get a real Civic Si power gain exhaust feel without making your commute miserable, and yes, we run these exact parts on our own cars because we hate drone as much as you do. \u003c\/p\u003e\n\u003cp\u003ePlease note the size option is for the adapter pipe. This is what helps the catback exhaust mate to different types of headers. All Full Race exhausts are 3\" exhaust systems. \u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eFits 2006 to 2011 Honda Civic Si Coupe FG2 and Sedan FA5, Civic Si coupe catback and Civic Si sedan catback\u003c\/li\u003e\n  \u003cli\u003eHeader back 8th gen Civic Si catback layout\u003c\/li\u003e\n  \u003cli\u003eFlange options for Civic Si 2.5 inch exhaust or Civic Si 3.0 inch catback\u003c\/li\u003e\n  \u003cli\u003eCivic Si T304 stainless exhaust construction, this is a Civic Si stainless catback that lasts\u003c\/li\u003e\n  \u003cli\u003eStraight through design for high flow, especially on K20 and K24 VTEC setups\u003c\/li\u003e\n  \u003cli\u003eV band flanges and clamps for quick install and solid sealing\u003c\/li\u003e\n  \u003cli\u003eSupports all motor builds and shines as a Civic Si turbo exhaust for better spool and top end\u003c\/li\u003e\n  \u003cli\u003eSound stays crisp with reduced drone, it’s loud when you’re on it, calm when you’re not\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eApplication Notes\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSome cars need a small rear heat shield tweak during install\u003c\/li\u003e\n  \u003cli\u003eIncluded gasket targets aftermarket downpipes\u003c\/li\u003e\n  \u003cli\u003eReuse or replace the OEM crush gasket if you’re mating to the factory downpipe\u003c\/li\u003e\n  \u003cli\u003eCheck clearance while you tighten everything down so nothing touches under load\u003c\/li\u003e\n  \u003cli\u003eIf your OEM hangers are tired, replace them, sloppy hangers make any exhaust bang around\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\nOptions Summary: Chassis FG2 Coupe, FA5 Sedan. Flange Size 2.5 inches, 3.0 inches. SKUs: FLR-CBE-01-06 FG2 2.5 inch, FLR-CBE-01-07 FG2 3.0 inch, FLR-CBE-01-08 FA5 2.5 inch, FLR-CBE-01-09 FA5 3.0 inch.\n\u003c\/p\u003e\n\n\u003cp\u003e\nIf you’re building a serious 8th gen Si, this Full-Race Civic Si exhaust gives you the flow, fit, and sound you want without weird compromises. It’s the kind of Honda Civic Si performance exhaust you install once, then stop thinking about, in a good way.\n\u003c\/p\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n 2006-2011 Honda Civic Si (Coupe)\u003cdiv\u003e2007-2011 Honda Civic Si (Sedan)\u003c\/div\u003e \n\u003c\/li\u003e\n\n\n\n\n\u003cli id=\"TechnicalData\"\u003e\nMaterial: T304 Stainless Steel\u003cdiv\u003ePiping Diameter Options: 2.5\" or 3.0\"\u003c\/div\u003e\n\u003cdiv\u003eFitment: 2006-2011 Honda Civic Si (Coupe and Sedan)\u003c\/div\u003e\n\u003cdiv\u003eExhaust Tip: Mirror-polished finish\u003c\/div\u003e\n\u003cdiv\u003eFlanges: V-band flanges and clamps included\u003c\/div\u003e\n\u003cdiv\u003eCompatibility: Works with turbo, naturally aspirated, and supercharged K20\/K24 engines\u003c\/div\u003e\n\u003cdiv\u003eAdditional Hardware: Optional pipe adapter for OEM or aftermarket headers\u003c\/div\u003e\n\u003cdiv\u003eInstallation Notes: May require slight modifications to rear heat shielding. Optional Torque Solution Exhaust Mount Kit is recommended for lowered vehicles or to prevent movement.  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\u003c\/ul\u003e\n","brand":"Full-Race","offers":[{"title":"FG2 Coupe \/ 2.5\"","offer_id":43156988231714,"sku":"FLR-CBE-01-06","price":899.99,"currency_code":"USD","in_stock":false},{"title":"FG2 Coupe \/ 3.0\"","offer_id":43156988264482,"sku":"FLR-CBE-01-07","price":899.99,"currency_code":"USD","in_stock":false},{"title":"FA5 Sedan \/ 2.5\"","offer_id":43156988297250,"sku":"FLR-CBE-01-08","price":899.99,"currency_code":"USD","in_stock":false},{"title":"FA5 Sedan \/ 3.0\"","offer_id":43156988330018,"sku":"FLR-CBE-01-09","price":899.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/full-race-catback-exhaust-8th_rgsn.jpg?v=1770161114"},{"product_id":"invidia-n1-catback-exhaust-for-06-11-civic-si-coupesedan","title":"Invidia N1 Catback Exhaust for 06-11 Civic Si","description":"\u003cul\u003e\n\u003cli\u003eHigh-Grade SUS304 Stainless Steel \u003c\/li\u003e\n\u003cli\u003eCNC-Machined Flanges for Perfect Fit \u003c\/li\u003e\n\u003cli\u003eMandrel-Bent Piping Improves Exhaust Flow \u003c\/li\u003e\n\u003cli\u003eStrong Performance Gains in Mid to Top-End \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e  \u003cli\u003e\u003ca href=\"#TechnicalData\"\u003eTechnical Data\u003c\/a\u003e\u003c\/li\u003e   \u003cli\u003e\u003ca href=\"#Included\"\u003eIncluded\u003c\/a\u003e\u003c\/li\u003e  \u003cli\u003e\u003ca href=\"#InstallGuide\"\u003eInstall Guide\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003ch3\u003eInvidia N1 Cat-Back Exhaust - 2006-2011 Honda Civic Si\u003c\/h3\u003e\n\n\u003cp\u003eWant more power and better sound from your 8th gen Civic Si? The Invidia N1 cat-back exhaust replaces your factory exhaust from the catalytic converter back with mandrel-bent SUS304 stainless steel piping. Your factory exhaust's restrictive and it chokes your K20Z3 at high RPM. The Invidia N1 flows way better, which gives you more power in the mid-range and top-end. You're also getting a louder, more aggressive exhaust note. Invidia makes this exhaust in two different pipe sizes (2.75\" and 3\") for both coupe and sedan, so pick the one that matches how you're using your car.\u003c\/p\u003e\n\n\u003ch4\u003e2.75\" vs 3\" Piping\u003c\/h4\u003e\n\n\u003cp\u003eInvidia makes the N1 in 2.75\" and 3\" piping. The 2.75\" version's quieter and it makes better low-end and mid-range power. If you're daily driving your Civic Si and you want more power without drone on the highway, get the 2.75\". The 3\" version's louder and it flows more at the top end. If you're making big power with a turbo or you just want the loudest exhaust possible, get the 3\". For a stock or mildly built K20Z3, the 2.75\" makes more usable power because it keeps exhaust velocity up.\u003c\/p\u003e\n\n\u003ch4\u003eMandrel-Bent SUS304 Stainless Steel\u003c\/h4\u003e\n\n\u003cp\u003eThe exhaust's made from SUS304 stainless steel with mandrel bends. Mandrel bends keep the pipe diameter consistent through the bends, which means better flow compared to crush-bent exhausts. SUS304 stainless resists rust way better than mild steel, so your exhaust's not going to rust out in a few years if you're driving in winter salt or humid climates. The flanges are CNC-machined for a tight fit at the connections.\u003c\/p\u003e\n\n\u003ch4\u003eWhat You Get\u003c\/h4\u003e\n\n\u003cul\u003e\n  \u003cli\u003eInvidia N1 cat-back exhaust system\u003c\/li\u003e\n  \u003cli\u003eMandrel-bent SUS304 stainless steel construction\u003c\/li\u003e\n  \u003cli\u003eCNC-machined flanges\u003c\/li\u003e\n  \u003cli\u003eBurnt tip finish\u003c\/li\u003e\n  \u003cli\u003eAll mounting hardware and gaskets included\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eAvailable Versions\u003c\/h4\u003e\n\n\u003cul\u003e\n  \u003cli\u003eCoupe 2.75\" (HS06HC2GTT): Quieter, better low\/mid power\u003c\/li\u003e\n  \u003cli\u003eCoupe 3\" (HS06HC2STT): Louder, more top-end flow\u003c\/li\u003e\n  \u003cli\u003eSedan 2.75\" (HS06HC4GTT): Quieter, better low\/mid power\u003c\/li\u003e\n  \u003cli\u003eSedan 3\" (HS06HC4STT): Louder, more top-end flow\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eFits Your Car\u003c\/h4\u003e\n\n\u003cul\u003e\n  \u003cli\u003e2006-2011 Honda Civic Si Coupe\u003c\/li\u003e\n  \u003cli\u003e2006-2011 Honda Civic Si Sedan\u003c\/li\u003e\n  \u003cli\u003e2008 Honda Civic MUGEN Si\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eCompatible Engines\u003c\/h4\u003e\n\n\u003cul\u003e\n  \u003cli\u003eK20Z3 (2006-2011 Civic Si)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Order the correct version for your car. Coupe exhausts don't fit sedans and sedan exhausts don't fit coupes. The 2.75\" version's quieter and makes better low\/mid power. The 3\" version's louder and flows more at the top end. For a stock or mildly built K20Z3, the 2.75\" makes more usable power. Get your car retuned after you install this exhaust if you're running other mods.\u003c\/p\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n \u003cul\u003e\n  \u003cli\u003e2006-2011 Honda Civic Si Coupe - use SKU HS06HC2GTT (2.75\") or HS06HC2STT (3\")\u003c\/li\u003e\n  \u003cli\u003e2006-2011 Honda Civic Si Sedan - use SKU HS06HC4GTT (2.75\") or HS06HC4STT (3\")\u003c\/li\u003e\n  \u003cli\u003e2008 Honda Civic MUGEN Si\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCoupe and sedan versions are not interchangeable.\u003c\/strong\u003e Double-check your body style before ordering. Fits K20Z3 engine only.\u003c\/p\u003e \n\u003c\/li\u003e\n\n\n\n\n\u003cli id=\"TechnicalData\"\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003cth\u003eMaterial\u003c\/th\u003e\n      \u003ctd\u003eSUS304 Stainless Steel\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003ePipe Construction\u003c\/th\u003e\n      \u003ctd\u003eMandrel-bent\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003ePipe Diameter - 2.75\" versions\u003c\/th\u003e\n      \u003ctd\u003e2.75 inches (69.85mm)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003ePipe Diameter - 3\" versions\u003c\/th\u003e\n      \u003ctd\u003e3.0 inches (76.2mm)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eTip Finish\u003c\/th\u003e\n      \u003ctd\u003eBurnt titanium tip\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eFlange Machining\u003c\/th\u003e\n      \u003ctd\u003eCNC-machined\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eSystem Type\u003c\/th\u003e\n      \u003ctd\u003eCat-back (catalytic converter back)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eCompatible Engine\u003c\/th\u003e\n      \u003ctd\u003eHonda K20Z3\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eFitment\u003c\/th\u003e\n      \u003ctd\u003e2006-2011 Honda Civic Si Coupe \u0026amp; Sedan, 2008 MUGEN Si\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\n\n\n \n\u003cli id=\"Included\"\u003e\n\u003cul\u003e\n  \u003cli\u003eInvidia N1 cat-back exhaust system (piping and muffler)\u003c\/li\u003e\n  \u003cli\u003eBurnt titanium exhaust tip\u003c\/li\u003e\n  \u003cli\u003eCNC-machined stainless flanges\u003c\/li\u003e\n  \u003cli\u003eMounting hardware\u003c\/li\u003e\n  \u003cli\u003eGaskets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\u003cli id=\"InstallGuide\"\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n","brand":"Invidia","offers":[{"title":"06-11 Civic Si Coupe \/ 70mm","offer_id":43962945667106,"sku":"NVD-HS06HC2GTT","price":903.56,"currency_code":"USD","in_stock":false},{"title":"06-11 Civic Si Coupe \/ 76mm","offer_id":43962945699874,"sku":"NVD-HS06HC2STT","price":1111.32,"currency_code":"USD","in_stock":false},{"title":"07-11 Civic Si Sedan \/ 70mm","offer_id":43962945732642,"sku":"NVD-HS06HC4GTT","price":903.56,"currency_code":"USD","in_stock":false},{"title":"07-11 Civic Si Sedan \/ 76mm","offer_id":43962945765410,"sku":"NVD-HS06HC4STT","price":1111.32,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/NVD-HS06HC4GTT-1.jpg?v=1773166042"},{"product_id":"speedfactory-copper-exhaust-manifold-gasket-k-series","title":"SpeedFactory Copper Exhaust Manifold Gasket for K Series","description":"\u003cul\u003e\n\u003cli\u003eIdela for Turbocharged K Series Builds \u003c\/li\u003e\n\u003cli\u003eReusable and Highly Durable Design \u003c\/li\u003e\n\u003cli\u003eFits K20 and K24 Engines \u003c\/li\u003e\n\u003cli\u003eHandles Extreme Heat and Pressure \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e   \u003cli\u003e\u003ca href=\"#Included\"\u003eIncluded\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003ch3\u003eSpeedFactory Copper Exhaust Manifold Gasket – Honda K-Series\u003c\/h3\u003e\n\n\u003cp\u003eThe SpeedFactory Copper Exhaust Manifold Gasket for Honda K-Series engines is engineered to handle the extreme heat and pressure of high-performance and turbocharged setups. Designed for racers and enthusiasts who demand durability and precision, this gasket delivers a superior seal that won’t break down or blow out under harsh conditions. Whether you’re pushing your car on the street or at the track, the SpeedFactory gasket ensures consistent exhaust flow and lasting protection for your engine.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003eConstructed from 0.039” (1.0mm) solid copper, this gasket provides unmatched heat resistance and sealing strength. The 0.061” (1.55mm) embossed sealing rings conform to surface irregularities, delivering a total gasket thickness of 0.100” (2.55mm) around each exhaust port for maximum clamp load. The solid copper construction improves thermal conductivity, stabilizing exhaust temperatures and preventing heat-related failures common with composite gaskets. The result is a reusable, race-proven gasket that maintains integrity through repeated heat cycles and extreme boost pressures.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003eIdeal for high-performance street, drag, and turbocharged applications, the SpeedFactory Copper Exhaust Manifold Gasket provides reliable, consistent performance you can depend on. Installation is simple—place the flat side against the cylinder head, torque evenly in a criss-cross pattern, and re-torque after the first full heat cycle for a perfect seal every time. When you need the best sealing solution for your K-Series setup, SpeedFactory delivers.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003ch4\u003eKey Features:\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eManufactured from 0.039” (1.0mm) solid copper for superior heat resistance\u003c\/li\u003e\n  \u003cli\u003e0.061” (1.55mm) embossed sealing rings improve surface conformity and clamp load\u003c\/li\u003e\n  \u003cli\u003eProvides excellent sealing, durability, and reusability\u003c\/li\u003e\n  \u003cli\u003ePrevents blowouts and heat-related gasket failures\u003c\/li\u003e\n  \u003cli\u003eIdeal for high-performance street, drag, and turbocharged applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\n\u003ch4\u003eInstallation Notes:\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eFlat side faces the cylinder head; embossed side faces the manifold\u003c\/li\u003e\n  \u003cli\u003eTighten bolts from the center outward in a criss-cross pattern\u003c\/li\u003e\n  \u003cli\u003eRe-torque after the first full heat cycle for optimal sealing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003c\/ul\u003e\n\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n   \u003c\/li\u003e\n\u003cli\u003e2006–2011 Acura CSX\u003c\/li\u003e\n  \u003cli\u003e2002–2006 Acura RSX\u003c\/li\u003e\n  \u003cli\u003e2004–2008 Acura TSX\u003c\/li\u003e\n  \u003cli\u003e2003–2007 Honda Accord\u003c\/li\u003e\n  \u003cli\u003e2002–2011 Honda Civic Si\u003c\/li\u003e\n  \u003cli\u003e2002–2006 Honda CR-V\u003c\/li\u003e\n  \u003cli\u003e2003–2011 Honda Element\u003c\/li\u003e \n\n\n\n\n\n\n\n \n\u003cli id=\"Included\"\u003e\n(1) Exhaust Manifold Gasket\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\u003c\/ul\u003e\n","brand":"SpeedFactory","offers":[{"title":"Default Title","offer_id":44428727910434,"sku":"SFR-02-251","price":41.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/SFR-02-251_djd7_1a83e9da-4c4c-414e-868c-2e0b48b42754.jpg?v=1763313355"},{"product_id":"honda-exhaust-gas-recirculation-valve-cover-egr-18711-pm1-j00","title":"Honda Exhaust Gas Recirculation (EGR) Port Plate18711-PM1-J00","description":"\u003cul\u003e\n\u003cli\u003eGenuine Honda Product \u003c\/li\u003e\n\u003cli\u003eDirect Factory Replacement Part \u003c\/li\u003e\n\u003cli\u003eFits K20Z3 and K24A8 Engines \u003c\/li\u003e\n\u003cli\u003eTop Cover Only, EGR Gasket Sold Separately \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e   \u003cli\u003e\u003ca href=\"#Included\"\u003eIncluded\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003ch3\u003eHonda K Series EGR Port Plate – OEM Exhaust Gas Recirculation Cover (Part #18711-PM1-J00)\u003c\/h3\u003e\n\n\u003cp\u003e\nThis Honda K Series EGR plate (Honda 18711-PM1-J00) is the genuine OEM Honda EGR port cover used to seal the exhaust gas recirculation passage on specific K Series heads. It’s the same Honda EGR replacement part your car left the factory with, not an aftermarket copy. You’ll see this Honda EGR port plate on K20Z3 and K24A8 engines. If you’re doing EGR system work, head service, or dealing with rotted hardware, this is the correct Honda Exhaust Recirculation plate to use. Don't forget the EGR gasket, which can be found here \u003ca href=\"https:\/\/www.hybrid-racing.com\/products\/honda-egr-valve-gasket-18715-pb2-000?_pos=1\u0026amp;_psq=18715-pb2-\u0026amp;_ss=e\u0026amp;_v=1.0\" target=\"_blank\"\u003e18715-PB2-000\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\nBuilt to Honda’s OEM spec, this Honda K Series EGR part fits cleanly and survives the constant heat cycles without warping. A leaking or missing Honda EGR port cover means exhaust blow-by at the head, lazy throttle response, weird noises in the bay, and sometimes fuel trims that don’t make sense. Swapping in a fresh OEM Honda EGR cover brings the sealing back to stock and avoids the “why won’t this cheap plate seal?” headache.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eGenuine OEM Honda K Series EGR port plate (Honda 18711-PM1-J00), not a replica\u003c\/li\u003e\n  \u003cli\u003eCorrect Honda EGR port cover for the cylinder head EGR passage\u003c\/li\u003e\n  \u003cli\u003ePrevents exhaust leaks, hot gas blow-by, and loss of efficiency\u003c\/li\u003e\n  \u003cli\u003eDirect-fit Honda K Series cylinder head cover for K20Z3 and K24A8\u003c\/li\u003e\n  \u003cli\u003ePerfect for EGR maintenance, head work, or replacing pitted \/ corroded hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eVehicle Compatibility\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e2006–2011 Honda Civic Si\u003c\/li\u003e\n  \u003cli\u003e2003–2011 Honda Element\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\nIf you’re tracking down an exhaust leak at the head or just freshening EGR hardware, this OEM Honda K Series EGR port cover keeps everything sealed and behaving like Honda intended. No weird fitment, no guessing—just the correct Honda K Series EGR plate that works every time. It also makes a solid “Honda EGR maintenance plate” to keep on hand if you wrench on multiple K cars.\n\u003c\/p\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n 2006-2011 Honda Civic Si\u003cdiv\u003e2003-2011 Honda Element\u003c\/div\u003e \n\u003c\/li\u003e\n\n\n\n\n\n\n \n\u003cli id=\"Included\"\u003e\n(1) EGR Port Cover\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\u003c\/ul\u003e\n","brand":"Honda","offers":[{"title":"Default Title","offer_id":44720561815586,"sku":"OHA-18711-PM1-J00","price":23.74,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/OHA-18711-PM1-J00_a6js.jpg?v=1767908693"},{"product_id":"full-race-exhaust-adapter-8th-gen-civic-si","title":"Full Race Catback Exhaust Adapter for 8th Gen 06-11 Civic Si","description":"\u003cul\u003e\n\u003cli\u003eAdapts Full Race Exhaust to Different Headers \u003c\/li\u003e\n\u003cli\u003e2.5\" and 3.0\" Header Flange Options \u003c\/li\u003e\n\u003cli\u003eFitments for 06-11 Civic Si Coupe and Sedan \u003c\/li\u003e\n\u003cli\u003eStainless Steel Construction \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e  \u003cli\u003e\u003ca href=\"#TechnicalData\"\u003eTechnical Data\u003c\/a\u003e\u003c\/li\u003e   \u003cli\u003e\u003ca href=\"#Included\"\u003eIncluded\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003ch3\u003eFull-Race 8th Gen Honda Civic Si Catback Exhaust Adapter\u003c\/h3\u003e\n\n\u003cp\u003eIf you run a Full-Race catback and you like to change parts as your build evolves, you already know the annoying part. One header swap turns into a whole exhaust redo. This Full Race Civic Si exhaust adapter fixes that. It lets you keep your Full-Race catback exhaust adapter in place and swap headers or downpipes without buying another catback. We use this exact idea on our own cars because nobody wants to cut up a perfectly good system just to try a different header.\u003c\/p\u003e\n\n\u003cp\u003eThis 8th Gen Civic Si catback adapter fits 2006 to 2011 Civic Si Coupe FG and Sedan FA. Pick the flange size that matches your current header or downpipe. The 2.5-inch Civic Si exhaust adapter option works with the OEM header and some aftermarket headers. If you step up to a larger header or downpipe, grab the 3.0-inch Civic Si exhaust adapter. Both options aim at the same thing, keep the joint aligned and sealed so you do not chase leaks or fight fitment under the car. If you want a Civic Si exhaust adapter that keeps Honda Civic Si catback compatibility intact after a header change, this is the clean way to do it.\u003c\/p\u003e\n\n\u003cp\u003eBottom line, this Full-Race Civic Si performance adapter is the simple part that keeps your exhaust plan flexible. It is basically your Civic Si exhaust header adapter and your Civic Si header change adapter rolled into one, and it saves you from redoing the whole catback every time you change direction.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eFull Race Civic Si exhaust adapter for 2006 to 2011 Honda Civic Si, FG coupe and FA sedan\u003c\/li\u003e\n  \u003cli\u003eKeeps your Full-Race catback in place when you change headers or downpipes\u003c\/li\u003e\n  \u003cli\u003eChoose 2.5 or 3.0 header flange size, pick what matches your setup\u003c\/li\u003e\n  \u003cli\u003eFull Race 2.5 exhaust adapter fits OEM header and select aftermarket headers\u003c\/li\u003e\n  \u003cli\u003eFull Race 3.0 exhaust adapter fits 3.0 headers or 3.0 downpipes\u003c\/li\u003e\n  \u003cli\u003eBuilt for correct alignment and sealing so you do not end up with leaks or a crooked system\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eOptions Summary:\u003c\/strong\u003e Fitment: Coupe, Sedan | Header Flange Size: 2.5\", 3.0\"\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eSKU: FLR-CEA-01-02\u003c\/strong\u003e | Fitment: Coupe | Header Flange Size: 2.5\"\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSKU: FLR-CEA-01-03\u003c\/strong\u003e | Fitment: Coupe | Header Flange Size: 3.0\"\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSKU: FLR-CEA-01-04\u003c\/strong\u003e | Fitment: Sedan | Header Flange Size: 2.5\"\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSKU: FLR-CEA-01-05\u003c\/strong\u003e | Fitment: Sedan | Header Flange Size: 3.0\"\u003c\/p\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n 2006-2011 Honda Civic Si \n\u003c\/li\u003e\n\n\n\n\n\u003cli id=\"TechnicalData\"\u003e\nHeader Flange Sizes: 2.5\" or 3.0\"\n\u003c\/li\u003e\n\n\n\n \n\u003cli id=\"Included\"\u003e\n(1) Exhaust Adapter\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\u003c\/ul\u003e\n","brand":"Full-Race","offers":[{"title":"Coupe \/ 2.5\"","offer_id":44744215035938,"sku":"FLR-CEA-01-02","price":149.99,"currency_code":"USD","in_stock":false},{"title":"Coupe \/ 3.0\"","offer_id":44744215068706,"sku":"FLR-CEA-01-03","price":149.99,"currency_code":"USD","in_stock":false},{"title":"Sedan \/ 2.5\"","offer_id":44744215101474,"sku":"FLR-CEA-01-04","price":149.99,"currency_code":"USD","in_stock":false},{"title":"Sedan \/ 3.0\"","offer_id":44744215134242,"sku":"FLR-CEA-01-05","price":149.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/full-race-catback-exhaust-adap_otz7.jpg?v=1770161372"},{"product_id":"dc-sports-universal-round-muffler","title":"DC Sports Universal Round Muffler","description":"\u003cul\u003e\n\u003cli\u003eMirror-Like Polished Stainless Steel \u003c\/li\u003e\n\u003cli\u003eUniversal Application \u003c\/li\u003e\n\u003cli\u003e4\" Tip Diameter \u003c\/li\u003e\n\u003cli\u003eWeld-On Installation \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e  \u003cli\u003e\u003ca href=\"#TechnicalData\"\u003eTechnical Data\u003c\/a\u003e\u003c\/li\u003e   \u003cli\u003e\u003ca href=\"#Included\"\u003eIncluded\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003ch3\u003eDC Sports Universal Round Muffler\u003c\/h3\u003e\n\u003cdiv\u003eThe DC Sports Universal Round Muffler is a universal exhaust upgrade for enthusiasts who want a cleaner look and a better exhaust note without turning their car into a rolling headache. Think of it as a car aesthetic muffler that still acts like a real performance exhaust muffler, not just a shiny can. Designed to give chassis lacking aftermarket support in the exhaust category a quality upgrade that not only looks good but sounds great too. \u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch4\u003e\u003cspan style=\"background-color: var(--rz-editor-content-background-color); color: var(--bs-body-color); font-size: var(--bs-body-font-size); text-align: var(--bs-body-text-align);\"\u003eKey Features:  \u003c\/span\u003e\u003c\/h4\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"background-color: var(--rz-editor-content-background-color); color: var(--bs-body-color); font-size: var(--bs-body-font-size); text-align: var(--bs-body-text-align);\"\u003e\u003cspan style=\"font-weight: bold;\"\u003eT304 stainless construction:\u003c\/span\u003e This is a T304 stainless steel muffler, so it holds up better than mild steel when your car sees rain, salt, or daily driver grime. If you want a corrosion-resistant muffler that still looks good after a few seasons, this stainless steel car muffler makes sense.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"background-color: var(--rz-editor-content-background-color); color: var(--bs-body-color); font-size: var(--bs-body-font-size); text-align: var(--bs-body-text-align);\"\u003e\u003cspan style=\"font-weight: bold;\"\u003eResonated sound, not just loud:\u003c\/span\u003e This resonated exhaust muffler gives you that deep sound muffler vibe with more tone and less rasp. You get a throaty sound muffler at idle and low rpm, then it cleans up when you cruise. It’s the kind of sport car exhaust muffler note that sounds intentional, not like a straight pipe muffler on a budget.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003eWe run DC Sports exhaust muffler setups ourselves, and this DC Sports muffler upgrade hits the sweet spot if your current can sounds thin or drones. You can weld it into your system in place of your old muffler and resonator, so plan on a shop visit if you do not weld. Keep your existing resonator if you like the volume where it’s at, or change the combo if you want more bite.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eThis universal round muffler gives your car a tougher look and a more enjoyable note without pretending it magically adds huge power on its own. Pair it with the rest of your exhaust, intake, and tune if you want real gains, then let this high-performance muffler handle the sound and the long-term durability.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eProduct SKUs and options:\u003c\/span\u003e\u003cbr\u003eSKU: EX-5012 | Cut: Straight | Inlet: 2\"\u003cbr\u003eSKU: EX-5015 | Cut: Straight | Inlet: 2.5\"\u003cbr\u003eSKU: EX-5016 | Cut: Slant | Inlet: 2.25\"\u003cbr\u003eOptions Summary: Cut: Straight, Slant | Inlet: 2\", 2.25\", 2.5\"\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n Universal \n\u003c\/li\u003e\n\n\n\n\n\u003cli id=\"TechnicalData\"\u003e\n\u003cdiv\u003e\u003cspan style=\"font-weight: bold;\"\u003eSlant Cut:\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003eOutlet: 3.25 inch\u003c\/div\u003e\n\u003cdiv\u003eLength: 16.25 inch\u003c\/div\u003e\n\u003cdiv\u003eFits: 2.25 inch\u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-weight: bold;\"\u003eStraight Cut:\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003eInlet: 2.25 inch\u003c\/div\u003e\n\u003cdiv\u003eOutlet: 4 inch\u003c\/div\u003e\n\u003cdiv\u003eLength: 21.5 inch\u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-weight: bold;\"\u003eShort Straight Cut:\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"background-color: var(--rz-editor-content-background-color); color: var(--bs-body-color); font-size: var(--bs-body-font-size); font-weight: var(--bs-body-font-weight); text-align: var(--bs-body-text-align);\"\u003eInlet: 2 inch\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003eOutlet: 4 inch\u003c\/div\u003e\n\u003cdiv\u003eLength: 17.5 inch  \u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/li\u003e\n\n\n\n \n\u003cli id=\"Included\"\u003e\n(1) Weld On Muffler\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\u003c\/ul\u003e\n","brand":"DC Sports","offers":[{"title":"Slant \/ 2.25\"","offer_id":44757606072354,"sku":"EX-5016","price":69.98,"currency_code":"USD","in_stock":false},{"title":"Straight \/ 2.5\"","offer_id":44757606105122,"sku":"EX-5015","price":69.98,"currency_code":"USD","in_stock":false},{"title":"Straight \/ 2\"","offer_id":44757606137890,"sku":"EX-5012","price":49.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/dc-sports-universal-round-muff_yn0h.jpg?v=1768855472"},{"product_id":"speedfactory-exhaust-mufflers-lt5-racing","title":"SpeedFactory LT-5 Turn Down Muffler","description":"\u003cul\u003e\n\u003cli\u003eThree Sizes Available \u003c\/li\u003e\n\u003cli\u003eWeld On Design \u003c\/li\u003e\n\u003cli\u003eTig Welded, Turn Down Tip \u003c\/li\u003e\n\u003cli\u003eStainless Steel Construction \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e   \u003cli\u003e\u003ca href=\"#Included\"\u003eIncluded\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003ch3\u003eSpeedFactory LT-5 Turn Down Universal Muffler - 2.5\", 3\", and 3.5\"\u003c\/h3\u003e\n  \n  \u003cp\u003eNeed a muffler that flows, sounds good, and doesn't look like something you bought at AutoZone? The SpeedFactory LT-5 race muffler is a straight through design with a 5-piece pie cut turn down tip that looks clean and keeps exhaust gases pointed at the ground instead of straight back. The round body is 6 inches in diameter and packed with premium multi-layer high temp material, which gives you better sound suppression than smaller round mufflers without killing power. Available in 2.5 inch, 3 inch, and 3.5 inch inlet sizes to match your exhaust setup.\u003c\/p\u003e\n\n  \u003ch4\u003eBuilt for Performance and Sound\u003c\/h4\u003e\n  \n  \u003cp\u003eThis is a straight through muffler, so exhaust flows straight through a perforated core with minimal restriction. That means it makes power, but it also means it's loud. SpeedFactory designed this muffler with a larger 6 inch diameter body and high density perforated core wrapped in a lot of premium packing material to keep the tone as deep and clean as possible. Most round body mufflers are smaller and have less packing, which makes them raspier and harsher. This muffler weighs 10 pounds because it has more sound deadening material inside. If you want a loud muffler that doesn't sound like trash, this is it.\u003c\/p\u003e\n\n  \u003ch4\u003e5-Piece Pie Cut Turn Down Tip\u003c\/h4\u003e\n  \n  \u003cp\u003eThe turn down tip is made from five sections of pie cut tubing welded together at an angle to point exhaust gases at the ground. The 5-piece design deflects sound waves exiting the rear of the car better than 4-piece tips, which helps dissipate sound. The tip is 4 inches in diameter and has the SpeedFactory logo laser engraved on it. It looks way better than a straight cut tip or some cheap slash cut.\u003c\/p\u003e\n\n  \u003ch4\u003eTIG Welded T304 Stainless Steel\u003c\/h4\u003e\n  \n  \u003cp\u003eThe entire muffler is built from polished T304 stainless steel. The body and tip are TIG welded and back purged, so the welds are clean inside and out. Stainless steel won't rust or corrode even if you're driving in wet or salty conditions. The polished finish looks good and stays looking good.\u003c\/p\u003e\n\n  \u003ch4\u003eFlared Inlet for Easy Installation\u003c\/h4\u003e\n  \n  \u003cp\u003eThe muffler inlet is flared to slip fit over your exhaust pipe. Just slide the muffler over your pipe, clamp it or weld it, and you're done. No cutting the inlet to size or trying to force it on.\u003c\/p\u003e\n\n  \u003ch4\u003eThree Inlet Sizes Available\u003c\/h4\u003e\n  \n  \u003cp\u003eSpeedFactory makes this muffler in three inlet sizes to match different exhaust setups:\u003c\/p\u003e\n\n  \u003ch5\u003e2.5 Inch Inlet\u003c\/h5\u003e\n  \u003cp\u003eUse this size if you're running 2.5 inch exhaust piping. Common on stock turbo builds and mild all-motor setups.\u003c\/p\u003e\n\n  \u003ch5\u003e3 Inch Inlet\u003c\/h5\u003e\n  \u003cp\u003eUse this size if you're running 3 inch exhaust piping. This is the most common size for turbo builds and big all-motor setups.\u003c\/p\u003e\n\n  \u003ch5\u003e3.5 Inch Inlet\u003c\/h5\u003e\n  \u003cp\u003eUse this size if you're running 3.5 inch exhaust piping. For high horsepower turbo builds where you need maximum flow.\u003c\/p\u003e\n\n  \u003ch4\u003eWhat You Get\u003c\/h4\u003e\n  \n  \u003cul\u003e\n    \u003cli\u003eSpeedFactory LT-5 turn down race muffler\u003c\/li\u003e\n    \u003cli\u003ePolished T304 stainless steel construction\u003c\/li\u003e\n    \u003cli\u003eTIG welded and back purged body and tip\u003c\/li\u003e\n    \u003cli\u003e6 inch diameter round body\u003c\/li\u003e\n    \u003cli\u003ePremium multi-layer high temp packing\u003c\/li\u003e\n    \u003cli\u003e4 inch diameter 5-piece pie cut turn down tip\u003c\/li\u003e\n    \u003cli\u003eLaser engraved SpeedFactory logo on tip\u003c\/li\u003e\n    \u003cli\u003eFlared inlet for easy installation\u003c\/li\u003e\n    \u003cli\u003eAvailable in 2.5\", 3\", or 3.5\" inlet size\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch4\u003eSpecifications\u003c\/h4\u003e\n  \n  \u003cul\u003e\n    \u003cli\u003eMuffler body length: 13.75 inches\u003c\/li\u003e\n    \u003cli\u003eMuffler body diameter: 6 inches\u003c\/li\u003e\n    \u003cli\u003eTotal length with inlet: 16 inches\u003c\/li\u003e\n    \u003cli\u003eTurn down tip diameter: 4 inches\u003c\/li\u003e\n    \u003cli\u003eTurn down tip design: 5-piece pie cut\u003c\/li\u003e\n    \u003cli\u003eWeight: 10 lbs\u003c\/li\u003e\n    \u003cli\u003eConstruction: Polished T304 stainless steel\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch4\u003eWorks on Most Builds\u003c\/h4\u003e\n  \n  \u003cul\u003e\n    \u003cli\u003eHonda\/Acura applications (most common use)\u003c\/li\u003e\n    \u003cli\u003eUniversal weld-on muffler fits any vehicle with matching exhaust pipe size\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e This is a straight through race muffler. It will be loud. The large body and premium packing keep the tone deep and clean, but this is not a quiet muffler. Pick your inlet size based on your exhaust pipe outside diameter. Universal weld-on application.\u003c\/p\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n Honda\/Acura \n\u003c\/li\u003e\n\n\n\n\n\n\n \n\u003cli id=\"Included\"\u003e\n(1) Muffler Body\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\u003c\/ul\u003e\n","brand":"SpeedFactory","offers":[{"title":"2.5 Inch","offer_id":44821702672418,"sku":"SFR-04-101","price":233.41,"currency_code":"USD","in_stock":false},{"title":"3 Inch","offer_id":44821702639650,"sku":"SFR-04-100","price":233.41,"currency_code":"USD","in_stock":false},{"title":"3.5 Inch","offer_id":44821702705186,"sku":"SFR-04-102","price":233.41,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/speedfactory-lt-5-turn-down-mu_9m08.jpg?v=1770687493"}],"url":"https:\/\/www.hybrid-racing.com\/collections\/civic-si-2006-2011-exhaust.oembed","provider":"Hybrid Racing","version":"1.0","type":"link"}