{"title":"Civic Si 2006-2011 Cooling","description":null,"products":[{"product_id":"hybrid-racing-31mm-36mm-t-bolt-hose-clamp","title":"Hybrid Racing 31mm to 36mm Adjustable T-Bolt Hose Clamps","description":"\u003cul\u003e\n\u003cli\u003eClean up your radiator hoses and engine bay. \u003c\/li\u003e\n\u003cli\u003eWon't chew up rubber like worm clamps. \u003c\/li\u003e\n\u003cli\u003eSold in packs of 2 \u003c\/li\u003e\n\u003cli\u003eMost applications need 2 or 4. \u003c\/li\u003e\n\u003cli\u003eAdjustable from 31mm to 36mm \u003c\/li\u003e\n\u003cli\u003eMade of Stainless Steel \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\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\nOur stainless steel radiator hose t-bolt clamps work great on the filler neck hose for 8th Gen (06-11) Honda Civic. Minimum size 31mm (1.22in), maximum size 36mm (1.41in.) Can also be used on many other hoses in the engine bay.\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\u003c\/ul\u003e\n","brand":"Hybrid Racing","offers":[{"title":"Default Title","offer_id":48938365572,"sku":"HYB-TBC-00-04","price":19.98,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/HYB-TBC-00-04_1.jpg?v=1748444740"},{"product_id":"hybrid-racing-12in-universal-slim-fan","title":"Hybrid Racing 12\" Universal Slim Fan","description":"\u003cul\u003e\n\u003cli\u003e12\" Slim Fan \u003c\/li\u003e\n\u003cli\u003e6.7 amps \u003c\/li\u003e\n\u003cli\u003e12v @ 80watts \u003c\/li\u003e\n\u003cli\u003e2.25\" thick! \u003c\/li\u003e\n\u003cli\u003e1200 CFM \u003c\/li\u003e\n\u003cli\u003eIncludes Mounting Hardware \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\n\u003cp\u003eThese universal slim fans can fit and work in a variety of applications. If you are doing a K-Series engine swap you will need to change the fan since the OE units are too thick. This fan works also works great with our full-size radiators. We recommend using a 12\" slim fan on half-size radiators (EG CIVICS USE 10-INCH FAN) and (2) 10\" fans on the full-size radiators. \u003c\/p\u003e\n \n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\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\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n","brand":"Hybrid Racing","offers":[{"title":"Default Title","offer_id":48947352772,"sku":"HYB-FAN-01-12","price":59.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/HYB-FAN-01-12_9.jpg?v=1721415333"},{"product_id":"thermostat-housing-plug-and-bracket","title":"Hybrid Racing K Series Thermostat Housing Plug \u0026 Bracket","description":"\u003cul\u003e\n\u003cli\u003eDon’t loop your heater lines! \u003c\/li\u003e\n\u003cli\u003eThis is a cleaner solution  \u003c\/li\u003e\n\u003cli\u003eUse with: HYB-CHP-01-02 \u003c\/li\u003e\n\u003cli\u003eO-ring’d plug that fits perfect \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\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\nSome of you may be interested in deleting the heater hoses and core from your K-swapped vehicle. The Hybrid Racing T-stat plug and bracket allows you to remove the OEM heater hose pipe and properly block off the opening that is left behind. The o-ring sealed plug is a perfect fit, and the special hold down bracket will make certain that the plug stays in place allowing you to clean up your engine bay and eliminate the long heater hose that is heating up your intake manifold! Ugly looped hoses are no longer needed.\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\u003c\/ul\u003e\n","brand":"Hybrid Racing","offers":[{"title":"Default Title","offer_id":48947525124,"sku":"HYB-HHP-01-02","price":24.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/HYB-HHP-01-02_1.jpg?v=1768016172"},{"product_id":"t-bolt-hose-clamps-hyb-tbc-00-02","title":"Hybrid Racing 38mm to 42mm Adjustable T-Bolt Hose Clamps","description":"\u003cul\u003e\n\u003cli\u003eClean up your engine bay. \u003c\/li\u003e\n\u003cli\u003eWon't chew up rubber like worm clamps \u003c\/li\u003e\n\u003cli\u003eSold in packs of 2 \u003c\/li\u003e\n\u003cli\u003eMost applications need 2 or 4. \u003c\/li\u003e\n\u003cli\u003eAdjustable from 38mm to 42mm \u003c\/li\u003e\n\u003cli\u003eMade of Stainless Steel \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\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\nAre you tired of the old school pressure clamps you have on your radiator hoses? Replace old work pressure for worm type clamps. These new T-bolt clamps are fully adjustable and work in a variety of applications.\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\u003c\/ul\u003e\n","brand":"Hybrid Racing","offers":[{"title":"Default Title","offer_id":48947544772,"sku":"HYB-TBC-00-02","price":14.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/HYB-TBC-00-02_1.jpg?v=1748444801"},{"product_id":"civic-si-t-bolt-hose-clamps","title":"Hybrid Racing T-Bolt Radiator Hose Clamps for 06-11 Civic Si","description":"\u003cul\u003e\n\u003cli\u003eClean Up Your Engine Bay \u003c\/li\u003e\n\u003cli\u003eWon't Chew Up Rubber like Worm Clamps \u003c\/li\u003e\n\u003cli\u003eComplete Kit for 06-11 Civic's \u003c\/li\u003e\n\u003cli\u003eMade of Stainless Steel \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\n\nUpgrade your engine bay with the Hybrid Racing T-Bolt Radiator Hose Clamps, designed specifically for the 2006-2011 Honda Civic Si. These premium clamps provide a secure and stylish alternative to outdated spring clamps, ensuring a snug fit while adding a sleek touch to your setup. The set includes four large 37mm-42mm T-bolt clamps and two small 31mm-36mm T-bolt clamps, perfectly sized for both OEM and Hybrid Racing silicone radiator hoses. Easy to install and built for durability, these clamps offer a reliable seal to prevent leaks and withstand the demands of your high-performance engine. Dress up your bay with confidence and functionality!\n\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-weight: bold;\"\u003eSet includes: \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003ex4 large 37mm to 42mm T-bolt band clamps\u003c\/div\u003e\n\u003cdiv\u003ex2 small 31mm to 36mm T-bolt band clamps.\u003c\/div\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n 2007-2010 Acura CSX Type S\u003cdiv\u003e2006-2011 Honda Civic Si\u003c\/div\u003e \n\u003c\/li\u003e\n\n\n\n\n\n\n \n\u003cli id=\"Included\"\u003e\n(4) 37mm to 42mm T-Bolt Clamps\u003cdiv\u003e(2) 31mm to 36mm T-Bolt Clamps  \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":"Hybrid Racing","offers":[{"title":"Default Title","offer_id":48948029956,"sku":"HYB-TBC-00-10","price":54.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/HYB-TBC-00-10_2crop.jpg?v=1748629340"},{"product_id":"hybrid-racing-10-slim-fan","title":"Hybrid Racing 10\" Universal Slim Fan","description":"\u003cul\u003e\n\u003cli\u003e10\" Slim Fan \u003c\/li\u003e\n\u003cli\u003e6.7 amps \u003c\/li\u003e\n\u003cli\u003e12v @ 80watts \u003c\/li\u003e\n\u003cli\u003e2.25\" thick! \u003c\/li\u003e\n\u003cli\u003e1000CFM \u003c\/li\u003e\n\u003cli\u003eIncludes Mounting Hardware \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\n\u003cp\u003eThese universal slim fans can fit and work in a variety of applications. If you are doing a K-Series engine swap you will need to change the fan since the OE units are too thick. This fan works also works great with our full-size radiators. We recommend using a 12\" slim fan on half-size radiators and (2) 10\" fans on the full-size radiators. \u003c\/p\u003e\n \n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\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\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n","brand":"Hybrid Racing","offers":[{"title":"Default Title","offer_id":48950955780,"sku":"HYB-FAN-01-10","price":59.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/HYB-FAN-01-10_6.jpg?v=1730477315"},{"product_id":"civic-si-silicone-radiator-hoses-hyb-rah-01-10-c","title":"Hybrid Racing Silicone Radiator Hoses for 06-11 Civic Si","description":"\u003cul\u003e\n\u003cli\u003e4-Ply Polyester Reinforced Silicone \u003c\/li\u003e\n\u003cli\u003eHR Green Inner lining \u003c\/li\u003e\n\u003cli\u003eMeets or exceeds SAE20R4# standards \u003c\/li\u003e\n\u003cli\u003eDress up your engine bay with durable, easy-to-clean silicone hoses. \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\n\u003cp\u003eThese high-quality radiator hoses are the last you’ll ever need. Made with multi-layer fiberglass reinforced silicone and finished with a durable silicone outer layer, they’re pressure and temperature resistant from -165° to 350°F. We’ve also altered the upper hose geometry to provide an extra inch of clearance for your cold air intake, eliminating interference and keeping everything clean. Speaking of clean, all you need is a little soapy water and a lint-free rag to keep these hoses looking their sexiest. Make your engine bay pop with Hybrid Racing’s silicone radiator hoses.\u003c\/p\u003e\n \n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n \n\u003cb\u003eFits:\u003c\/b\u003e\n\u003cul\u003e\n\u003cli\u003e2006-2011 Honda Civic Si\u003c\/li\u003e\n\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\u003cul\u003e\n\u003cli\u003eUpper radiator hose\u003c\/li\u003e\n\u003cli\u003eLower radiator hose\u003c\/li\u003e\n\u003cli\u003eRadiator filler neck hose\u003c\/li\u003e\n\u003c\/ul\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":"Hybrid Racing","offers":[{"title":"Default Title","offer_id":48952263556,"sku":"HYB-RAH-01-10","price":129.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/HYB-RAH-01-10_1.jpg?v=1744206671"},{"product_id":"hybrid-racing-silicone-oil-cooler-hoses-fg-c","title":"Hybrid Racing Silicone Oil Cooler Hoses for 06-11 Civic Si","description":"\u003cul\u003e\n\u003cli\u003eReplace Your Cracked Factory Hoses \u003c\/li\u003e\n\u003cli\u003eWithstands High Heat, Pressure, and Chemical Exposure \u003c\/li\u003e\n\u003cli\u003eMulti-Layer Fiberglass Reinforcement \u003c\/li\u003e\n\u003cli\u003eFits K20Z3 \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\u003eHybrid Racing Silicone Oil Cooler Hoses – 2006-2011 Honda Civic Si\u003c\/h3\u003e\n\n\u003cp\u003e\nUpgrade the reliability of your \u003cstrong\u003e2006-2011 Honda Civic Si\u003c\/strong\u003e with the \n\u003cstrong\u003eHybrid Racing Silicone Oil Cooler Hoses\u003c\/strong\u003e. Factory EPDM rubber hoses are \nnotorious for breaking down over time due to chemical reactions with engine metals, coolant, \nand extreme heat. This often leads to premature failure, cracking, and costly repairs. \nHybrid Racing designed these \u003cstrong\u003esilicone oil cooler hoses\u003c\/strong\u003e to eliminate those \nweak points and keep your K20Z3 engine’s cooling system operating at peak efficiency. \n\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003e\nConstructed from multi-layer reinforced silicone, these hoses are far more resistant to heat, \npressure, and chemical breakdown than OEM rubber. The smooth interior surface promotes \nconsistent coolant flow while the high-strength outer layers provide long-lasting durability. \nWhether you’re daily driving, tracking, or building for reliability, these hoses are the \nperfect complement to Hybrid Racing’s silicone radiator hose kits.  \n\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eDirect fit for the 2006-2011 Honda Civic Si (K20Z3)\u003c\/li\u003e\n  \u003cli\u003eMulti-layer reinforced silicone construction\u003c\/li\u003e\n  \u003cli\u003eWithstands high heat, pressure, and chemical exposure\u003c\/li\u003e\n  \u003cli\u003ePrevents premature cracking and failure common with OEM rubber hoses\u003c\/li\u003e\n  \u003cli\u003eComplements Hybrid Racing radiator hose kits for a complete upgrade\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\n\u003ch4\u003eFitment\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e2006-2011 Honda Civic Si (FA5\/FG2, K20Z3 engine)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n 2006-2011 Honda Civic Si\u003cbr\u003e\u003cspan style=\"font-style: italic;\"\u003e*Any Chassis Using K20Z3 Swaps\u003c\/span\u003e\u003cul\u003e\n\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(2) Oil Cooler Hoses\u003cdiv\u003e(4) Worm Gear Clamps\u003c\/div\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":"Hybrid Racing","offers":[{"title":"Black","offer_id":48953563076,"sku":"HYB-OCH-01-15","price":39.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/products\/IMG_4356.jpg?v=1640789145"},{"product_id":"hybrid-racing-16an-to-16orb-fitting-universal","title":"Hybrid Racing -16AN to -16ORB Straight Fitting (Universal)","description":"\u003cul\u003e\n\u003cli\u003eConverts -16 O-ring fitting \u003c\/li\u003e\n\u003cli\u003eTo -16AN fitting \u003c\/li\u003e\n\u003cli\u003eUniversal fitment  \u003c\/li\u003e\n\u003cli\u003eWorks with thermostat housing \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\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\nThis fitting is machined from billet aluminum and anodized black for a smooth durable finish. Use this fitting to connect your Hybrid Racing lower K-Series Adjustable Thermostat Housing to your radiator using AN fittings\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eThis fitting is specifically designed to work with our housing. It includes the correct compliant o-ring to prevent leaks or corrosion. Sold separately or this part can be purchased with the HYB-TSA-01-01 product. \u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e*Thermostat housing not included*\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\u003c\/ul\u003e\n","brand":"Hybrid Racing","offers":[{"title":"Default Title","offer_id":40999294500898,"sku":"HYB-FIT-00-70","price":19.98,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/HYB-FIT-00-70_1.jpg?v=1768016191"},{"product_id":"hybridracing-low-temp-thermostat-k20z3-k24a2-rbc","title":"Hybrid Racing Low Temp Thermostat (K20Z3 \u0026 K24A2, K24Z7)","description":"\u003cul\u003e\n\u003cli\u003eIdeal for racing cars\u003c\/li\u003e\n\u003cli\u003eReduces temp hunting\u003c\/li\u003e\n\u003cli\u003eOEM Quality Made in Japan\u003c\/li\u003e\n\u003cli\u003eFully open @ 68*C\/154.4*F\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca href=\"#Description\" class=\"active\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#TechnicalData\"\u003eTechnical Data\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#Included\"\u003eIncluded\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#InstallGuide\"\u003eInstall Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli id=\"Description\" class=\"active\"\u003eWe know the advantages of using a low-temperature thermostat in high-performance or race environments are evident. Opening the thermostat's valve at a lower temperature allows coolant to flow more freely during low-load sections of the racetrack. This enables the radiator to effectively regulate the engine's temperature within the optimal range during high-load sections. If a cooling system is pushed to its limits at the racetrack and overheating becomes an issue, a low-temperature thermostat can often resolve this problem. It achieves this by allowing the radiator to perform more cooling at lower engine loads, thereby preventing or delaying overheating during high-engine loads.\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eThis part is made specifically for the Honda \/ Acura K20Z3, K24A1, K24A2 \u0026amp; K24Z7 engines. \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);\"\u003e\u003cbr\u003e\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);\"\u003eLow-temperature thermostats offer several advantages and are useful in various situations. Here are some key reasons why they are beneficial:\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\n\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); font-weight: bold;\"\u003eEnhanced Engine Cooling:\u003c\/span\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);\"\u003e Low-temperature thermostats allow coolant to flow more freely at lower temperatures, improving the cooling efficiency of the engine. By opening the thermostat's valve at a lower temperature, they help maintain the engine within the optimal temperature range during high-load conditions. This can prevent overheating and ensure consistent performance, especially in demanding situations like racing or high-performance driving.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\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); font-weight: bold;\"\u003ePrevention of Temperature Hunting:\u003c\/span\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);\"\u003e Low-quality thermostats can cause temperature hunting, characterized by erratic fluctuations in coolant temperature. In contrast, low-temperature thermostats are designed to prevent hunting by controlling the flow of coolant more effectively. This stability in temperature helps avoid issues such as cracked cylinder heads and reduces strain on the cooling system.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\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); font-weight: bold;\"\u003eImproved Durability:\u003c\/span\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);\"\u003e High-quality, low-temperature thermostats, like those offered by Nippon Thermostat Co. Ltd in the provided context, undergo extensive durability testing. This testing includes heating and cooling cycles, vibration testing, and real-world testing in both road and race cars. As a result, these thermostats are built to withstand demanding conditions and have superior durability, reducing the risk of failure and ensuring long-lasting performance.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\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); font-weight: bold;\"\u003eCustomizable Cooling Systems: \u003c\/span\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);\"\u003eLow-temp thermostats offer the flexibility to fine-tune the engine's cooling system. They allow for better control over coolant flow and temperature regulation, enabling enthusiasts and engineers to optimize cooling performance according to specific needs and preferences. This customization can be particularly valuable in racing, where precise cooling management is critical for maintaining optimal engine performance.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\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);\"\u003eOverall, low-temperature thermostats provide improved engine cooling, prevent temperature hunting, offer durability, and allow for customizable cooling systems. These advantages make them a valuable component, especially in high-performance applications where maintaining optimal temperatures is crucial for engine performance and longevity.\u003c\/span\u003e\u003cbr\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);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003eOur HYPERCOOL thermostats are produced by an OEM supplier that has been in existence since 1954; Their thermostats are used in over 50% of cars manufactured in Japan and are widely utilized in motorsports events such as Le Mans and WRC. The durability of thermostats is crucial, especially considering the potential consequences of a malfunctioning thermostat and subsequent engine overheating. To ensure durability, we conduct rigorous testing on their low-temperature thermostats, including various cycles of heating and cooling, vibration testing, engine bench testing, as well as real-world testing in both road cars and race cars.  \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);\"\u003e\u003cbr\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli id=\"VehicleFitment\"\u003e2006-2011 Honda Civic Si (K-Series K20Z3)\n\u003cdiv\u003e2012-2015 Honda Civic Si (K-Series K24Z7)\n\u003cdiv\u003e2013-2015 Acura ILX Premium (MT Only - K-Series K24Z7)\u003c\/div\u003e\n\u003cdiv\u003e2004-2008 Acura TSX  (K-Series K24A2)\u003c\/div\u003e\n\u003cdiv\u003e2007-2014 Honda CR-V (K-Series K24Z1)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli id=\"TechnicalData\"\u003e\n\u003cdiv\u003eOur thermostats begin opening between 18-20*F sooner compared to the OEM part. \u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\nParaffin wax functions as the actuator for opening and closing the thermostat. As the temperature increases, paraffin wax expands, pushing against a plunger and spring, which directly actuates the valve. As coolant temperature decreases, the thermostat body is cooled. Therefore, the paraffin wax shrinks, and a return spring pushes against the valve and plunger to return the thermostat to a partially open or closed position.  \n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eThe opening temperature of paraffin thermostats is primarily dependent on the spring rate of the return spring. The stiffer the spring, the greater the pressure the wax needs to generate to push the plunger. This wax chamber’s pressure is directly proportional to wax temperature. (Note: opening temperature can also be controlled by paraffin wax chamber and plunger geometry).   \u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli id=\"Included\"\u003ex1 Hybrid Racing HYPERCOOL Low Temp Thermostat - 68*C\/154.4*F\n\u003cdiv\u003ex1 OEM Rubber Gasket\u003c\/div\u003e\n\u003cdiv\u003ex1 OEM Housing  \u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli id=\"InstallGuide\"\u003e\u003ca href=\"https:\/\/guides.hybrid-racing.com\/Guide\/Install+HYB-LTT-01-15\/382\"\u003eCLICK TO VIEW INSTALL GUIDE\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hybrid Racing","offers":[{"title":"Default Title","offer_id":41073746837538,"sku":"HYB-LTT-01-15","price":119.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/HYB-LTT-01-15-001_-_SQ_f5627835-40f2-45d0-be59-6dc88f851051.jpg?v=1687545216"},{"product_id":"skunk2-alpha-series-aluminum-radiator-for-2006-2011-honda-civic","title":"Skunk2 Alpha Series Aluminum Radiator for 06-11 Civic Si","description":"\u003cul\u003e\n\u003cli\u003eFits the 06-11 Civic Si and Acura CSX \u003c\/li\u003e\n\u003cli\u003eAll-Aluminum Construction \u003c\/li\u003e\n\u003cli\u003eDual-Core Design \u003c\/li\u003e\n\u003cli\u003eCompatible with Factory Fans \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=\"#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\u003eSkunk2 Alpha Series Radiator for 2006-2011 Honda Civic – High-Performance Aluminum Cooling Upgrade\u003c\/h3\u003e\n\n\u003cp\u003eEnhance your 2006-2011 Honda Civic’s cooling system with the Skunk2 Alpha Series Radiator, a high-performance, direct-fit radiator engineered for superior cooling efficiency, durability, and engine performance. Designed for both street and track use, this lightweight, all-aluminum radiator features a dual-core, 100% brazed aluminum construction that delivers improved heat transfer and reliability over the stock unit.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003eWith polished end tanks and the signature Skunk2 Alpha logo embossed on the surface, this radiator adds both performance and style to your Civic’s engine bay. The dual-pass design and high-density cooling fins help maintain lower engine temperatures under extreme driving conditions, making it a perfect upgrade for modified and high-output engines. The included genuine Skunk2 radiator cap complements the system’s performance and aesthetic appeal.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis half-size radiator is designed as a direct OEM replacement, featuring 1.25-inch inlet and outlet ports for compatibility with factory and aftermarket radiator hoses. It comes pre-equipped with provisions for the OEM cooling fan, ensuring easy installation without the need for cutting or welding. Skunk2 quality ensures each unit is pressure tested and built to exceed OEM standards, providing a long-lasting, high-efficiency cooling solution for your Civic.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003eWhether you're replacing a worn OEM unit or building a track-ready setup, the Skunk2 Alpha Series Radiator is the ultimate cooling upgrade for the 2006-2011 Honda Civic. It supports OEM hoses, fans, and shrouds.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003ch4\u003eKey Features:\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned for 2006-2011 Honda Civic (all trims except Hybrid)\u003c\/li\u003e\n  \u003cli\u003eHigh-performance, all-aluminum dual-core construction\u003c\/li\u003e\n  \u003cli\u003eDirect-fit design compatible with OEM hoses and cooling fans\u003c\/li\u003e\n  \u003cli\u003e1.25\" inlet\/outlet, polished end tanks with Skunk2 Alpha logo\u003c\/li\u003e\n  \u003cli\u003eIncludes Skunk2 radiator cap for optimal pressure control\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem style=\"\"\u003eUpgrade your Civic’s performance and reliability with the Skunk2 Alpha Series Radiator—engineered for drivers who demand more from their cooling system.\u003c\/em\u003e\u003c\/p\u003e\n\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\nMaterial: Aluminum\u003cdiv\u003eCore Type: Brazed\u003c\/div\u003e\n\u003cdiv\u003eDesign: Dual-Core\u003c\/div\u003e\n\u003cdiv\u003eInlets\/Outlets: 1.25-inch\u003c\/div\u003e\n\u003cdiv\u003eCompatibility: OEM Cooling Fan, Hoses, and Shrouds\u003c\/div\u003e\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\u003cli id=\"InstallGuide\"\u003e\nInstallation is straightforward, utilizing factory mounting points. No vehicle modifications required. Compatible with OEM and most aftermarket hoses.\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n","brand":"Skunk2 Racing","offers":[{"title":"Default Title","offer_id":43245501448226,"sku":"SK2-349-05-3000","price":242.01,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/SK2-349-05-3000_1crop.jpg?v=1747929250"},{"product_id":"k-series-coolant-tube-block-plug","title":"Circuit Hero K-Series Coolant Tube Block Plug","description":"\u003cul\u003e\n\u003cli\u003eCNC 1-piece Premium 6061 Aluminum \u003c\/li\u003e\n\u003cli\u003eCompatible with K20 and K24 Thermostat Bodies \u003c\/li\u003e\n\u003cli\u003eRe-Uses or Replaces Factory O-Ring \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 \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\nThis Circuit Hero product helps eliminate unnecessary parts for a K-series race engine build. This billet coolant plug eliminates the coolant pipe that leads to the OEM K-series thermostat housing. FeaturesCNC 1-piece Premium 6061 aluminum Easy Installation (does require the drilling of a small hole through thermostat housing for Allen screw)Re-use or replace factory rubber O-ring from OEM coolant tube Use in conjunction with OEM Honda Hex Plug P\/N# 12208-PR3-000 \u0026amp; Crush Washer P\/N 12209-PR3-000Compatible with K20 and K24 thermostat bodies \n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n 2006-2011 Acura CSX\u003cdiv\u003e2002-2006 Acura RSX\u003c\/div\u003e\n\u003cdiv\u003e2004-2008 Acura TSX\u003c\/div\u003e\n\u003cdiv\u003e2003-2007 Honda Accord\u003c\/div\u003e\n\u003cdiv\u003e2002-2005 Honda Civic Si\u003c\/div\u003e\n\u003cdiv\u003e2006-2011 Honda Civic Si\u003c\/div\u003e\n\u003cdiv\u003e2002-2006 Honda CR-V\u003c\/div\u003e\n\u003cdiv\u003e2003-2011 Honda Element\u003c\/div\u003e \n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\u003c\/ul\u003e\n","brand":"Circuit Hero","offers":[{"title":"Black","offer_id":43381612412962,"sku":"CH-CBP-BK","price":25.0,"currency_code":"USD","in_stock":false},{"title":"Polished","offer_id":43381612445730,"sku":"CH-CBP-RAW","price":25.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/CH-CBP-RAW_4crop.jpg?v=1768014071"},{"product_id":"honda-k20z3-water-pump-19200-rbc-013","title":"Honda K20Z3 Water Pump 19200-RBC-013","description":"\u003cul\u003e\n\u003cli\u003eGenuine Honda Product \u003c\/li\u003e\n\u003cli\u003eDirect Factory Replacement Part \u003c\/li\u003e\n\u003cli\u003eCompatible with K20Z3 Engines \u003c\/li\u003e\n\u003cli\u003eVital Component of the Cooling System \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 RBC Water Pump for 2006-2011 Civic Si (K20Z3) , OEM Replacement\u003c\/h3\u003e\n\n\u003cp\u003eIf your temp gauge starts creeping up in traffic or you see coolant weeping at the pump, don’t gamble it. This is the Original Honda Water Pump RBC, the Honda Water Pump 19200-RBC-013, the same spec pump Honda used as the Factory Honda Water Pump K20Z3 on the Si. It’s the right call for a straight up replacement on a 06-11 Civic Si.\u003c\/p\u003e\n\n\u003cp\u003eThis Honda Civic Si Water Pump is a direct fit, so you won’t mess with brackets or weird pulley alignment. You bolt it on, bleed the system, and you’re back to stable temps. That matters on the K20Z3 because consistent coolant flow keeps the engine happy when you’re sitting in summer heat or bouncing off VTEC on a back road. We run OEM pumps like this on our own cars when we want stock like reliability over rolling the dice on a cheap reman.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features:\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCorrect fit for the K20Z3, this is the Civic Si K20Z3 Water Pump and K20Z3 Engine Water Pump\u003c\/li\u003e\n  \u003cli\u003eGenuine OEM replacement, the Honda K20Z3 OEM Water Pump that matches factory spec\u003c\/li\u003e\n  \u003cli\u003eKeeps coolant moving the way it should, this Civic Si Engine Cooling Pump helps prevent overheating when the old pump gets tired\u003c\/li\u003e\n  \u003cli\u003eDirect fit install, no modifications, this is the OEM RBC Water Pump Civic Si and K20Z3 Cooling System Pump\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eCompatible Applications:\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e2006-2011 Honda Civic Si (K20Z3 Engine)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eSKU: OHA-19200-RBC-013. If your pump has play, noise, or seepage, replace it before it turns into an overheat and a bad day. This Honda Civic Si Water Pump keeps your cooling system simple, stock, and dependable, which is exactly what you want from a Honda Civic Si Cooling Pump replacement.\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\n\n \n\u003cli id=\"Included\"\u003e\n(1) Water Pump\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":43538597609506,"sku":"OHA-19200-RBC-013","price":378.2,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/OHA-19200-RBC-013_1crop_386a42fc-9398-49a7-9bff-c2837108ea89.jpg?v=1747403961"},{"product_id":"skunk2-silicone-radiator-hose-kit-06-11-honda-civic-si","title":"Skunk2 Silicone Radiator Hoses for 06-11 Honda Civic Si","description":"\u003cul\u003e\n\u003cli\u003eMulti-Layer Fiber Reinforced Construction \u003c\/li\u003e\n\u003cli\u003eOEM Fitment with Enhanced Clearance \u003c\/li\u003e\n\u003cli\u003eResistant To Heat and Chemicals \u003c\/li\u003e\n\u003cli\u003eGloss Black Finish with Red Core \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\u003cdiv class=\"product-description\"\u003e\n  \u003ch3\u003eSkunk2 Silicone Radiator Hose Kit – 2006-2011 Honda Civic Si\u003c\/h3\u003e\n  \u003cp\u003e\n    Upgrade your engine bay with the Skunk2 Silicone Radiator Hose Kit, specifically engineered for the 2006-2011 Honda Civic Si (2.0L K20Z3). These high-performance radiator hoses are handmade using automotive-grade silicone and feature multi-layer embedded fiber reinforcement that’s built to handle extreme engine temperatures and pressure. Whether you're daily driving or hitting the track, these hoses are designed for maximum durability, strength, and long-lasting reliability.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Each kit is test-fitted for OEM compatibility and fits perfectly with the factory water neck, thermostat housing, radiator, and hose clamps. The newly redesigned upper hose provides improved clearance for aftermarket air intake systems, including Skunk2's own Cold Air Intake. With a sleek gloss black finish and a bold red core, these hoses not only enhance performance but also add a clean, aggressive look under the hood. Don’t wait for your stock hoses to fail—replace and upgrade with Skunk2's proven silicone radiator hose technology today.\n  \u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch4\u003eFeatures\u003c\/h4\u003e\n\n  \u003cul\u003e\n    \u003cli\u003eCompatible with 2006-2011 Honda Civic Si (2.0L K20Z3)\u003c\/li\u003e\n    \u003cli\u003eGloss black finish with contrasting red inner core\u003c\/li\u003e\n    \u003cli\u003eMulti-layer fiber-reinforced silicone for strength\u003c\/li\u003e\n    \u003cli\u003eResistant to high heat, pressure, and chemical exposure\u003c\/li\u003e\n    \u003cli\u003eOEM fit and finish – works with factory hose clamps\u003c\/li\u003e\n    \u003cli\u003eImproved routing for better clearance with aftermarket intakes\u003c\/li\u003e\n    \u003cli\u003eFeatures classic Skunk2 logo for a motorsport-inspired look\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\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\n\n \n\u003cli id=\"Included\"\u003e\n(2) Radiator Hoses, Upper \u0026amp; Lower\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":43765758689314,"sku":"SK2-629-05-0004","price":104.26,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/SK2-629-05-0004-1crop_71eb433b-326a-4e2c-8793-ef0491eff83a.png?v=1745512150"},{"product_id":"tractuff-rbb-rbc-water-bypass-adapter","title":"TracTuff Water Bypass Adapter for 06-11 Civic\/04-08 TSX","description":"\u003cul\u003e\n\u003cli\u003eAllows Use of PRB\/PRC Intake Manifold \u003c\/li\u003e\n\u003cli\u003eBillet Aluminum Construction \u003c\/li\u003e\n\u003cli\u003eFits RBC\/RBB\/RAA\/RSP Heads \u003c\/li\u003e\n\u003cli\u003eCompatible with 8th Gen Si, TSX, Accord, and Element \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\u003eTracTuff Water Bypass Adapter – 06-11 Civic Si\/04-08 TSX\/03-07Accord\u003c\/h3\u003e\n\n\u003cp\u003eThe TracTuff Water Bypass Adapter is an essential upgrade for enthusiasts looking to install an aftermarket PRB or PRC-style intake manifold on their K20Z3-powered 2006-2011 Honda Civic or K24A2-powered 2004-2008 Acura TSX. The factory RBC-style cylinder head routes coolant through the intake manifold, but popular aftermarket manifolds do not. This adapter bridges that design difference, allowing the use of PRB\/PRC-style manifolds without leaving the coolant bypass or EGR ports exposed.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003eDeveloped in 2008, the TracTuff Water Bypass Adapter was created to expand intake manifold options for K-series owners while improving performance and serviceability. It provides a direct coolant bypass connection and seals the unused EGR passage. Even if you keep the stock manifold, you’ll benefit from reduced intake manifold temperatures by removing hot coolant circulation. This also eliminates the need to drain or bleed the cooling system every time you remove the intake manifold, simplifying maintenance and swaps.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with 2006-2011 Honda Civic (K20Z3), 2004-2008 Acura TSX (K24A2), 2003-2007 Honda Accord (K24A4\/A8), 2003-2011 Honda Element (K24A8)\u003c\/li\u003e\n  \u003cli\u003eAllows installation of PRB and PRC-style intake manifolds\u003c\/li\u003e\n  \u003cli\u003eConnects the coolant bypass passage and covers the unused EGR port\u003c\/li\u003e\n  \u003cli\u003eReduces heat transfer to the intake manifold for cooler intake temperatures\u003c\/li\u003e\n  \u003cli\u003eEliminates the need to drain or bleed the cooling system during manifold removal\u003c\/li\u003e\n  \u003cli\u003ePerfect for K-series swap builds and performance upgrades\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n 2004-2008 Acura TSX\u003cdiv\u003e2003-2007 Honda Accord\u003cbr\u003e\u003cdiv\u003e2006-2011 Honda Civic Si\u003c\/div\u003e\n\u003c\/div\u003e\n\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) Billet Adapter\u003cdiv\u003e(1) 90 Degree Barb Fitting\u003c\/div\u003e\n\u003cdiv\u003e(1) Worm Gear Clamp\u003c\/div\u003e\n\u003cdiv\u003e(1) O-Ring\u003c\/div\u003e\n\u003cdiv\u003e(1) Stainless Mounting Link\u003c\/div\u003e\n\u003cdiv\u003e(1) Allen Head Bolt - Short\u003c\/div\u003e\n\u003cdiv\u003e(1) Hex Head Bolt - Long\u003c\/div\u003e\n\u003cdiv\u003e(1) M8 Jamb Screw\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":"TracTuff","offers":[{"title":"Default Title","offer_id":44508368371746,"sku":"TUF-TT-KWBA-V1","price":87.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/TUF-TT-KWBA-V1_3crop_1cb3d77c-49c4-46f7-be69-0b281d842b6b.jpg?v=1762791607"},{"product_id":"tractuff-radiator-fill-pot-rbc-rbb","title":"TracTuff Radiator Fill Pot for 06-11 Civic Si\/04-08 TSX","description":"\u003cul\u003e\n\u003cli\u003eCompatible with K20Z3, K24A2, K24A4, and K24A8 Engines \u003c\/li\u003e\n\u003cli\u003eBillet Aluminum Construction \u003c\/li\u003e\n\u003cli\u003eMakes for Easier Coolant System Bleeding \u003c\/li\u003e\n\u003cli\u003eWorks with Hybrid Racing Radiator Cap \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\u003eTracTuff Radiator Fill Pot – K20Z3 \u0026amp; K24A2\/A4\/A8\u003c\/h3\u003e\n\n\u003cp\u003eThe TracTuff Radiator Fill Pot is a proven cooling upgrade for the K20Z3 and K24A2, K24A4, and K24A8 engines found in the 2006-2011 Honda Civic Si, 2004-2008 Acura TSX, 2003-2007 Honda Accord, and 2003-2011 Honda Element. Originally created in 2011 as a personal project, this fill pot quickly became one of TracTuff’s most requested products for its functionality, clean design, and compatibility with OEM components. The option shown here features the OEM engine angle, 2.0L configuration, standard hose connection, and close-to-OEM outlet position, making it ideal for direct-fit applications.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003eMachined from premium 6061-T6 aluminum, the TracTuff Radiator Fill Pot features a precision flange with a -16 ORB outlet port and a 1\/2″ NPT heater port. The tank’s compact design makes excellent use of engine bay space while maintaining easy access for filling and maintenance. The kit includes four M8 socket head bolts, a 1\/2″ NPT plug, and a pair of O-rings for a secure installation. The assembly is TIG-welded to sit level on engines with a 15° lean (OEM option) and maintains a factory-style fit and finish that complements any K-series setup.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis fill pot is compatible with the \u003ca href=\"https:\/\/www.hybrid-racing.com\/products\/hybrid-racing-performance-radiator-cap-c?_pos=28\u0026amp;_sid=65c58cd41\u0026amp;_ss=r\" target=\"_blank\"\u003eHybrid Racing Type F Radiator Cap\u003c\/a\u003e and other early model Honda radiator caps with a spring. The integrated 1\/16″ NPT port allows for a connection to an overflow tank, and the standard hose outlet supports easy installation with OEM upper radiator hoses. If you prefer AN fittings, the pot can be configured with custom outlet options to suit your cooling system layout. Optional heater hose connections are also available for those who wish to retain in-cabin heat.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with K20Z3 and K24A2, K24A4, K24A8 engines\u003c\/li\u003e\n  \u003cli\u003eFits 2006-2011 Honda Civic Si, 2004-2008 Acura TSX, 2003-2007 Honda Accord, and 2003-2011 Honda Element\u003c\/li\u003e\n  \u003cli\u003eMachined 6061-T6 aluminum flange with -16 ORB outlet and 1\/2″ NPT heater port\u003c\/li\u003e\n  \u003cli\u003eOEM engine angle, 2.0L setup, standard hose connection, and close-to-OEM outlet position\u003c\/li\u003e\n  \u003cli\u003eSupports OEM-style radiator caps (88–91 Civic\/CRX, 90–93 Integra)\u003c\/li\u003e\n  \u003cli\u003eIncludes mounting hardware, NPT plug, and O-rings\u003c\/li\u003e\n  \u003cli\u003eClean, functional design that improves serviceability and coolant management\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n 2004-2008 Acura TSX\u003cdiv\u003e2003-2007 Honda Accord\u003c\/div\u003e\n\u003cdiv\u003e2006-2011 Honda Civic Si\u003c\/div\u003e\n\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) Swirl Pot Assembly\u003cdiv\u003e(4) M8 Socket Head Bolts\u003cdiv\u003e(1) 1\/2″ NPT Plug\u003c\/div\u003e\n\u003cdiv\u003e(2) O-Rings  \u003c\/div\u003e\n\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":"TracTuff","offers":[{"title":"Default Title","offer_id":44508894363682,"sku":"TUF-TT-3Z3ST-HCV1-S","price":362.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/TUF-TT-KWBA-V1crop.jpg?v=1762808383"},{"product_id":"tractuff-water-pump-block-adapter-fitting-k-series","title":"Tractuff Water Pump\/Block Fitting for Honda K Series","description":"\u003cul\u003e\n\u003cli\u003eFits Honda\/ Acura K Series Engines \u003c\/li\u003e\n\u003cli\u003eAvailable as -6 AN Adapter or Block Off \u003c\/li\u003e\n\u003cli\u003eO-Ring Included \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\u003eTracTuff Water Pump\/Block Adapter Fitting – Honda K Series\u003c\/h3\u003e\n\n\u003cp\u003eThe TracTuff Water Pump\/Block Adapter Fitting is a versatile cooling solution for Honda K Series engines. Available as either a -6 AN adapter fitting or a block-off plug, this fitting provides a clean and reliable way to modify or delete the factory coolant lines used with the OEM oil cooler. Whether you are simplifying your setup, adding a water-cooled accessory, or rerouting coolant flow, this adapter gives you full control of your K-series cooling circuit.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003eEach fitting is machined from U.S.-milled 6061 aluminum for exceptional strength and precision. The backside features an O-ring register that seals perfectly using a Genuine Honda O-ring to ensure a leak-free fit. The design allows the same part to fit both the block and the water pump, making it easy to order a matching pair for your project. If you want to completely eliminate the coolant hoses, choose the block-off version. For custom cooling setups, the -6 AN male flare fitting is ideal for plumbing water-cooled accessories such as turbochargers or heat exchangers.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese adapters allow coolant to flow correctly by creating a complete circuit, rather than routing two high-pressure ports together. The block-side fitting is used as a feed, while the water pump-side fitting acts as a return. This ensures proper coolant movement through your accessory and prevents pressure buildup. If your K-series build does not use the OEM oil-cooled water pump, you can complete the coolant loop with a TracTuff Thermostat Port Adapter. For builds retaining the heater core, a simple T-fitting can integrate the bypass line into the system.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eAvailable as a -6 AN fitting or block-off adapter\u003c\/li\u003e\n  \u003cli\u003eCompatible with all Honda K Series engines\u003c\/li\u003e\n  \u003cli\u003eMachined from high-quality 6061 aluminum\u003c\/li\u003e\n  \u003cli\u003eFits both the block and water pump ports\u003c\/li\u003e\n  \u003cli\u003eIncludes stainless steel button head bolt and Genuine Honda O-ring\u003c\/li\u003e\n  \u003cli\u003eAllows custom coolant routing or oil cooler delete\u003c\/li\u003e\n  \u003cli\u003eIdeal for turbo or accessory water feed and return applications\u003c\/li\u003e\n  \u003cli\u003eMade in the USA with precision machining and durable construction\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n 2002-2006 Acura RSX\u003cdiv\u003e2004-2008 Acura TSX\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 CR-V\u003c\/div\u003e\n\u003cdiv\u003e2003-2011 Honda Element\u003c\/div\u003e \n\u003c\/li\u003e\n\n\n\n\n\u003cli id=\"TechnicalData\"\u003e\n\u003cbr\u003e\n\u003c\/li\u003e\n\n\n\n \n\u003cli id=\"Included\"\u003e\n(1) -6 AN Fitting or (1) Block Off Adapter\u003cdiv\u003e(1) Button Head Bolt\u003c\/div\u003e\n\u003cdiv\u003e(1) O-Ring\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":"TracTuff","offers":[{"title":"-6 AN Adapter","offer_id":44509256220706,"sku":"TUF-TT-KWP-6","price":26.95,"currency_code":"USD","in_stock":false},{"title":"Block Off","offer_id":44509256253474,"sku":"TUF-TT-KWP-BO","price":24.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/TUF-TT-KWP-6_1crop_a9383080-ce21-4204-8ea8-390fae58675c.jpg?v=1762817039"},{"product_id":"tractuff-water-bypass-block-off-k20z3-k24a2","title":"TracTuff Water Bypass Block Off for 06-11 Civic\/04-08 TSX","description":"\u003cul\u003e\n\u003cli\u003eEliminates Coolant Bypass \u003c\/li\u003e\n\u003cli\u003eBillet Aluminum Construction \u003c\/li\u003e\n\u003cli\u003eBlock Off Plate and Fitting Included \u003c\/li\u003e\n\u003cli\u003eFits K20Z3 and K24A2 Engines \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\u003eTracTuff Water Bypass Block Off – K20Z3 \/ K24A2 \/ K24A4 \/ K24A8\u003c\/h3\u003e\n\n\u003cp\u003e\nThe TracTuff Water Bypass Block Off is designed for enthusiasts running the K20Z3 and K24A-series engines found in the 2006–2011 Honda Civic Si and 2004–2008 Acura TSX. Built for those who want a simple, effective way to delete the factory water bypass, this precision-machined block off provides a clean and functional solution without unnecessary complexity or cost.\n\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003e\nThis product was developed after years of customer feedback surrounding the original TracTuff Water Bypass Adapter. Many users were simply plugging the adapter rather than routing coolant through it. To better serve those builds, TracTuff created a dedicated block-off plate that retains all the fitment precision and quality of the adapter, without the added expense of unused features.\n\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003e\nEach block-off is machined from high-quality aluminum for strength and durability, featuring the same attention to detail that defines every TracTuff component. It installs cleanly and maintains a factory-like appearance while removing the need for additional fittings or hoses. While this part allows you to simplify your cooling setup, it’s important to understand that the water bypass serves a functional role in engine temperature management. Research the pros and cons of this modification to ensure it aligns with your build goals.\n\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003e\n\u003cspan style=\"font-style: italic;\"\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e If you plan to add a sensor port, drill and tap from the front side for your sensor’s thread pitch. Do \u003cstrong\u003enot\u003c\/strong\u003e start tapping from the back.\n\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-style: italic;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003ch2\u003eKey Features:\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with K20Z3 and K24A2, K24A4, and K24A8 engines\u003c\/li\u003e\n  \u003cli\u003eFits 2006–2011 Honda Civic Si, 2004–2008 Acura TSX\u003c\/li\u003e\n  \u003cli\u003eMachined from high-grade aluminum for a precise, durable fit\u003c\/li\u003e\n  \u003cli\u003eIdeal for water bypass delete setups and simplified cooling systems\u003c\/li\u003e\n  \u003cli\u003eMaintains a clean, OEM-like appearance\u003c\/li\u003e\n  \u003cli\u003eEasy to drill and tap for sensor installation if desired\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n 2004-2008 Acura TSX\u003cdiv\u003e2006-2011 Honda Civic Si\u003c\/div\u003e \n\u003c\/li\u003e\n\n\n\n\n\n\n \n\u003cli id=\"Included\"\u003e\n(1) Block Off Plate\u003cdiv\u003e(1) Block Off Fitting\u003c\/div\u003e\n\u003cdiv\u003e(1) Stainless Link\u003c\/div\u003e\n\u003cdiv\u003e(1) O-Ring\u003c\/div\u003e\n\u003cdiv\u003e(1) Button Head Screw\u003c\/div\u003e\n\u003cdiv\u003e(1) Allen Head Bolt - Short\u003c\/div\u003e\n\u003cdiv\u003e(1) Hex Head Bolt - Long\u003c\/div\u003e\n\u003cdiv\u003e(1) Hex Nut\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":"TracTuff","offers":[{"title":"Default Title","offer_id":44511751372834,"sku":"TUF-TT-KWB-BO","price":54.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/TUF-TT-KWP-BO_3crop_44563dfb-a5c6-4ba2-ad63-0e6b98564acf.jpg?v=1762878547"},{"product_id":"tractuff-water-neck-k20z3-v2-rsx","title":"TracTuff RBC\/RBB Water Neck for 06-11 Civic Si\/04-08 TSX","description":"\u003cul\u003e\n\u003cli\u003eBillet Aluminum Construction \u003c\/li\u003e\n\u003cli\u003eRetains OE Style Radiator Hose \u003c\/li\u003e\n\u003cli\u003eCompatible on DC5\/EP3 with K20Z3\/K24A2 Head \u003c\/li\u003e\n\u003cli\u003e-16 ORB Outlet Port \u0026amp; 1\/2\" NPT Heater Plug \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\u003eTracTuff RBC\/RBB Water Neck Flange V2 – 2006–2011 Honda Civic Si \/ 2004–2008 Acura TSX\u003c\/h3\u003e\n\n\u003cp\u003e\nThe TracTuff RBC\/RBB Water Neck Flange V2 fixes the usual space and hose-routing headaches you run into on K-swapped cars. It’s a compact Civic Si water neck upgrade that works on the 2006–2011 Civic Si and 2004–2008 TSX, plus the 2003–2007 Accord and 2003–2011 Element. If you’re piecing together a K24A water neck this flange gives you clean routing without the bulky factory casting.\n\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003e\nThe K20Z3 billet water neck (SKU: TUF-TT-KWN-Z3-V2) uses 6061‑T6 aluminum and runs a -16 ORB outlet with a 1\/2\" NPT heater port. That means you can ditch sketchy adapters and run proper AN lines or a clean Civic Si radiator hose adapter setup. The low-profile body works in tight FWD bays and RWD or chassis conversions that need at least 1.562\" between the cylinder head and firewall. It bolts to K24A\/A2\/A4\/A8, K20Z3, and any RAA\/RBB\/RBC\/RSP head, so it’s right at home on an RBC RB water neck style intake swap or a TracTuff water neck Civic street\/track car.\n\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e6061‑T6 billet aluminum TracTuff water neck for strength without excess weight\u003c\/li\u003e\n  \u003cli\u003e-16 ORB outlet port so you can run proper AN lines and keep high-flow cooling on big-power setups\u003c\/li\u003e\n  \u003cli\u003e1\/2\" NPT heater port with options: run the heater, cap it, or customize routing\u003c\/li\u003e\n  \u003cli\u003eBuilt for tight FWD bays and RWD K-series swaps where firewall and subframe clearance actually matter\u003c\/li\u003e\n  \u003cli\u003eCleans up hose routing compared to the stock neck and makes custom radiator layouts easier\u003c\/li\u003e\n  \u003cli\u003eDirect fit for K24A\/A2\/A4\/A8 and K20Z3 engines\u003c\/li\u003e\n  \u003cli\u003eWorks with RAA\/RBB\/RBC\/RSP head castings, including common RBC water neck RSX and Civic setups\u003c\/li\u003e\n  \u003cli\u003eGreat match for custom radiators, tucked bays, and TracTuff billet water neck builds that see real track time\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\n\u003ch4\u003eIncluded Hardware\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eFour M8 socket head bolts for a solid, leak-free mount\u003c\/li\u003e\n  \u003cli\u003e90° heater hose fitting for easy heater core routing where space is tight\u003c\/li\u003e\n  \u003cli\u003e1\/2\" NPT plug if you’re deleting the heater or simplifying the bay\u003c\/li\u003e\n  \u003cli\u003eTwo O-rings to seal the flange and keep you from chasing leaks later\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eVehicle Compatibility\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e2006–2011 Honda Civic Si (perfect for a clean Civic Si K24 swap water neck)\u003c\/li\u003e\n  \u003cli\u003e2004–2008 Acura TSX\u003c\/li\u003e\n  \u003cli\u003e2003–2007 Honda Accord\u003c\/li\u003e\n  \u003cli\u003e2003–2011 Honda Element\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\n\u003cp\u003e\nIf you’re tired of fighting the stock casting, random adapters, or hacked hoses, this TracTuff RBC water neck RSX\/Civic style flange gives you a compact, AN‑friendly layout that just works. It’s a solid upgrade for any TracTuff RBC water neck or RSX billet water neck style K build where you actually care about cooling and clearance, not just making it “good enough to run.”\n\u003c\/p\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n 2004-2008 Acura TSX\u003cdiv\u003e2003-2007 Honda Accord\u003c\/div\u003e\n\u003cdiv\u003e2006-2011 Honda Civic Si\u003c\/div\u003e\n\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) Water Neck\u003cdiv\u003e(1) Barb Fitting\u003c\/div\u003e\n\u003cdiv\u003e(1) Plug\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":"TracTuff","offers":[{"title":"Default Title","offer_id":44512094224418,"sku":"TUF-TT-KWN-Z3-V2","price":137.94,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/TUF-TT-KWN-Z3-V2_1crop.jpg?v=1765422859"},{"product_id":"tractuff-k-series-thermostat-housing-port-adapter","title":"TracTuff Thermostat Housing Port Adapter for Honda K Series","description":"\u003cul\u003e\n\u003cli\u003eFits Most Honda\/Acura K Series Engines \u003c\/li\u003e\n\u003cli\u003eDrill Bit and Safety Wire Included \u003c\/li\u003e\n\u003cli\u003e6061 Aluminum Construction \u003c\/li\u003e\n\u003cli\u003eDesigned as Coolant Return Fitting \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\u003eTracTuff Thermostat Housing Port Adapter for Honda\/Acura K Series Engines\u003c\/h3\u003e\n\n\u003cp\u003e\nThe TracTuff Thermostat Housing Port Adapter is the ultimate solution for Honda and Acura K Series engines that demand versatility, reliability, and performance. Designed for builders running custom cooling systems, this adapter makes it easy to retain in-cabin heat with TracTuff swirl pots, clear tight-fitting sidewinder turbo manifolds, or route heater core lines in rear-wheel-drive K swaps where the OEM tube would normally contact the firewall.\n\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003e\nEach adapter is precision-machined and engineered to fit perfectly into the factory K Series thermostat housing. It’s available in a 5\/8-inch slip hose connection for easy integration with standard heater or coolant lines. The kit includes a -210 O-ring for a leak-free seal, a drill bit, and stainless steel safety wire for secure installation. This thoughtful design ensures a durable, vibration-resistant connection that can handle the heat and pressure of high-performance builds.\n\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003e\nUnlike other generic fittings, the TracTuff Thermostat Housing Port Adapter is specifically engineered to function as a return fitting, constantly pulling coolant from the connected system to maintain consistent flow. Whether you’re upgrading your K20, K24A2, or K24A4 engine, or performing a custom K swap, this fitting helps simplify your cooling setup while keeping your system efficient and clutter-free.\n\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003ch2\u003eKey Features:\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned for Honda and Acura K Series engines\u003c\/li\u003e\n  \u003cli\u003eRetains in-cabin heat with TracTuff swirl pots\u003c\/li\u003e\n  \u003cli\u003eIdeal for sidewinder turbo setups and rear-wheel-drive K swaps\u003c\/li\u003e\n  \u003cli\u003e5\/8″ slip hose connection for easy plumbing\u003c\/li\u003e\n  \u003cli\u003eIncludes -210 O-ring, drill bit, and stainless safety wire\u003c\/li\u003e\n  \u003cli\u003eEngineered to function as a coolant return fitting\u003c\/li\u003e\n  \u003cli\u003eEnsures reliable sealing and secure installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\n\u003cp\u003e\nUpgrade your cooling system with the TracTuff Thermostat Housing Port Adapter and experience the quality, precision, and innovation that makes TracTuff a trusted name in Honda K Series performance. Whether you’re chasing lap times or perfecting your street setup, this adapter delivers the flexibility your build deserves.\n\u003c\/p\u003e\n\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n 2002-2006 Acura RSX\u003cdiv\u003e2004-2008 Acura TSX\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 CR-V\u003c\/div\u003e\n\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) Coolant Return Fitting\u003cdiv\u003e(1) Drill Bit\u003c\/div\u003e\n\u003cdiv\u003e(1) Safety Wire\u003c\/div\u003e\n\u003cdiv\u003e(1) O-Ring\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":"TracTuff","offers":[{"title":"Default Title","offer_id":44513561280546,"sku":"TUF-TT-KTHPA-5\/8","price":29.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/8_1crop_4fb6bb64-9bd7-45dd-870b-9b3219921a4c.jpg?v=1762904701"},{"product_id":"tractuff-rbb-rbc-water-neck-oem-angle","title":"TracTuff OEM Angle Water Neck for 06-11 Civic Si\/04-08 TSX","description":"\u003cul\u003e\n\u003cli\u003eBillet 6061 Aluminum Construction \u003c\/li\u003e\n\u003cli\u003eCompatible with 06-11 Civic Si and 04-08 TSX \u003c\/li\u003e\n\u003cli\u003ePerfect Upgrade for K Swaps \u003c\/li\u003e\n\u003cli\u003eWater Neck Sits Level When Installed \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\u003eTracTuff OEM Angle Water Neck for 06-11 Civic Si\/04-08 TSX\/K Swaps\u003c\/h3\u003e\n\n\u003cp\u003eUpgrade your cooling system with the TracTuff OEM Angle Water Neck — a solution designed for the 2006–2011 Honda Civic Si and 2004–2008 Acura TSX. Compatible with popular K-series engines including the K24A, K24A2, K24A4, K24A8, K20Z3, and K20Z4, this billet aluminum water neck offers a cleaner, stronger, and more efficient alternative to the bulky OEM unit. Designed to provide a cleaner look when using these engines in K Swap chassis, such as the EG Civic or DC Integra. \u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe TracTuff OEM Angle Water Neck starts with a beautifully CNC-machined 6061-T6 aluminum flange that incorporates the largest possible outlet port within the OEM gasket footprint for optimal flow. A 1.25-inch angled tube replicates the OEM outlet position, while a 1\/2-inch NPT heater port comes standard to maintain flexibility for various setups — whether you choose to run a heater core or cap it off. The design eliminates the unnecessary EGR and bulky fittings found on factory parts, giving your engine bay a cleaner, more performance-oriented look.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003eEach TracTuff water neck includes a complete hardware kit with four M8 socket head bolts, a 90° heater hose fitting, a 1\/2-inch NPT plug, and two o-rings for a secure and leak-free installation. The outlet tube is precision-welded to sit level, ensuring consistent fitment and reliable coolant routing even under demanding performance conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eDirect replacement for OEM upper water neck on K-series engines\u003c\/li\u003e\n  \u003cli\u003eConstructed from durable 6061-T6 billet aluminum\u003c\/li\u003e\n  \u003cli\u003e1.25-inch angled outlet mimics factory hose alignment\u003c\/li\u003e\n  \u003cli\u003eIncludes 1\/2-inch NPT heater port for heater hose or optional plug\u003c\/li\u003e\n  \u003cli\u003eEliminates EGR and bulky OEM fittings for a cleaner installation\u003c\/li\u003e\n  \u003cli\u003eComplete hardware kit included for easy installation\u003c\/li\u003e\n  \u003cli\u003eCompatible with multiple K-series engines and Honda\/Acura applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e2006–2011 Honda Civic Si (K20Z3)\u003c\/li\u003e\n  \u003cli\u003e2004–2008 Acura TSX (K24A2)\u003c\/li\u003e\n  \u003cli\u003e2006–2011 Honda Civic Type R (K20Z4)\u003c\/li\u003e\n  \u003cli\u003e2003–2007 Honda Accord (K24A4 \/ K24A8)\u003c\/li\u003e\n  \u003cli\u003e2003–2011 Honda Element (K24A4 \/ K24A8)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\n\u003cp\u003eWhether you’re refreshing your cooling system or optimizing your K-swap setup, the TracTuff OEM Angle Water Neck provides the perfect combination of form, function, and reliability — all while improving flow and simplifying your engine bay layout.\u003c\/p\u003e\n\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n 2004-2008 Acura TSX\u003cdiv\u003e2006-2011 Honda Civic Si\u003c\/div\u003e \n\u003c\/li\u003e\n\n\n\n\n\n\n \n\u003cli id=\"Included\"\u003e\n(1) Water Neck\u003cdiv\u003e(2) O-Rings\u003c\/div\u003e\n\u003cdiv\u003e(1) 90 Degree Barb Fitting\u003c\/div\u003e\n\u003cdiv\u003e(1) Worm Gear Clamp\u003c\/div\u003e\n\u003cdiv\u003e(3) Mounting Blts\u003c\/div\u003e\n\u003cdiv\u003e(1) Plug\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":"TracTuff","offers":[{"title":"Default Title","offer_id":44517458313250,"sku":"TUF-TT-KWN-Z3-HC-V1","price":127.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/TUF-TT-KWN-Z3-HC-V1_3crop_e4343bcb-ee84-443c-af36-7ed386653500.jpg?v=1762968533"},{"product_id":"tractuff-rbc-rbb-water-neck-flange","title":"TracTuff RBB\/RBC Water Neck Flange","description":"\u003cul\u003e\n\u003cli\u003eBillet 6061 Aluminum Construction \u003c\/li\u003e\n\u003cli\u003eWater Neck Flange for K20Z3\/K24A \u003c\/li\u003e\n\u003cli\u003eCompatible with -16 ORB Fittings \u003c\/li\u003e\n\u003cli\u003eAllows for Custom Radiator Hose Setups \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\u003eTracTuff RBB\/RBC Water Neck Flange for K-Series Engines\u003c\/h3\u003e\n\n\u003cp\u003eThe TracTuff RBB\/RBC Water Neck Flange is a precision-machined billet aluminum component designed for enthusiasts building or customizing K-series engine cooling setups. Compatible with K20Z3, K24A, K24A2, K24A4, K24A8, and K20Z4 engines, this flange allows users to add the specific type of fitting required for their setup, providing flexibility without the need to purchase a fully assembled water neck. It’s perfect for setups using \u003ca href=\"https:\/\/www.hybrid-racing.com\/products\/tractuff-16-orb-fitting-standard-radiator-hose\" target=\"_blank\"\u003e-16 ORB to 1.25\" standard hose fittings\u003c\/a\u003e or -16 ORB to -16 AN fittings for AN radiator hoses.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003eCrafted from high-quality 6061-T6 aluminum, the flange features a -16 ORB outlet port and a 1\/2\" NPT heater port to accommodate a heater hose or plug. The hardware kit includes four M8 socket head bolts, a 90° heater hose fitting, a 1\/2\" NPT plug, and two o-rings for a secure and leak-free installation. This flange is sold separately from the fittings, giving enthusiasts full control over their cooling system configuration.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eDirect fit for K20Z3, K24A, K24A2, K24A4, K24A8, and K20Z4 engines\u003c\/li\u003e\n  \u003cli\u003eBeautifully machined from 6061-T6 aluminum for strength and durability\u003c\/li\u003e\n  \u003cli\u003eIncludes -16 ORB outlet port and 1\/2\" NPT heater port\u003c\/li\u003e\n  \u003cli\u003eHardware kit included for secure installation\u003c\/li\u003e\n  \u003cli\u003eAllows use of custom fittings such as -16 ORB to 1.25\" hose or -16 ORB to -16 AN\u003c\/li\u003e\n  \u003cli\u003eFlange sold separately; fittings sold separately for full customization\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eK20Z3\u003c\/li\u003e\n  \u003cli\u003eK24A, K24A2, K24A4, K24A8\u003c\/li\u003e\n  \u003cli\u003eAny engine using RAA, RBB, RBC, or RSP cylinder head casting\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\n\u003cp\u003eThe TracTuff RBB\/RBC Water Neck Flange provides enthusiasts with the freedom to design their ideal cooling setup, ensuring reliable flow, high-quality construction, and adaptability for any custom or performance-oriented K-series build.\u003c\/p\u003e\n\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n 2004-2008 Acura TSX\u003cdiv\u003e2006-2011 Honda Civic Si\u003c\/div\u003e \n\u003c\/li\u003e\n\n\n\n\n\n\n \n\u003cli id=\"Included\"\u003e\n(1) Water Neck Flange\u003cdiv\u003e(1) 90 Degree Barb Fitting\u003c\/div\u003e\n\u003cdiv\u003e(1) Plug\u003c\/div\u003e\n\u003cdiv\u003e(4) Mounting Bolts\u003c\/div\u003e\n\u003cdiv\u003e(1) Worm Gear Clamp\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":"TracTuff","offers":[{"title":"Default Title","offer_id":44517486362658,"sku":"TUF-TT-KWN-Z3-V1","price":89.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/TUF-TTKWN-Z3-V1_5crop_ff503694-f576-4137-b2ac-f78e8a81184c.jpg?v=1762970588"},{"product_id":"tractuff-k20-k24-water-pump-housing-delete","title":"TracTuff K20\/K24 Water Pump Housing Delete","description":"\u003cul\u003e\n\u003cli\u003eEliminates OEM Water Pump Housing \u003c\/li\u003e\n\u003cli\u003eAlternator Bracket Included \u003c\/li\u003e\n\u003cli\u003eEnhanced Cooling by Reducing Cavitation \u003c\/li\u003e\n\u003cli\u003eNot Compatible with Air Conditioning \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\u003eTracTuff K20\/K24 Water Pump Housing Delete\u003c\/h3\u003e\n\n\u003cp\u003eThe TracTuff K20\/K24 Water Pump Housing Delete is a high-performance solution designed to free your K-series engine from the parasitic drag of the OEM mechanical water pump. Compatible with K20A, K20Z, K24A, and K24Z engines, this water pump delete uncouples the pump from the crankshaft, providing immediate benefits such as increased horsepower and torque, elimination of cavitation at high RPM, and improved control over cooling system temperatures. Perfect for serious street cars and race cars alike, this kit is designed for enthusiasts seeking maximum efficiency and engine bay space.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003eIn January 2023, the TracTuff water pump delete received significant upgrades. The alternator bracket was redesigned to work seamlessly with the Dailey Engineering Dry Sump kit, moving the alternator upward to increase compatibility. The tensioner window was relocated to eliminate misalignment, and the traditional M8 tensioner bolt was replaced with a precision-ground stainless pin retained by a 5\/16″ circlip for zero slop and improved durability.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003ePlease note that removing the water pump housing, eliminates the opportunity to retain air conditioning as some of the mounting points are removed. \u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003ch4\u003eKey Features:\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eParasitic Drag Reduction:\u003c\/strong\u003e Removes the mechanical water pump from the crankshaft to free horsepower and torque.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnhanced Cooling Control:\u003c\/strong\u003e Reduces pump cavitation and allows programming-based control over coolant flow, including manual override while the engine is off.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUpgraded Alternator Bracket:\u003c\/strong\u003e Compatible with Dailey Engineering Dry Sump kits and supports various high-amperage alternators, with the S2000 alternator recommended for OEM-style integration.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecision Tensioner System:\u003c\/strong\u003e Features a stainless pin and circlip, eliminating slop and ensuring reliable belt tension without thread interference.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Quality Hardware:\u003c\/strong\u003e Includes o-ring, zinc-plated hardware, QA1 5\/16″ rod-end tensioner, stainless pin, and 5\/16″ circlip for a complete install.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLarge Water Inlet Port:\u003c\/strong\u003e 1-5\/16″-12 SAE (-16AN ORB) inlet sealed by included o-ring for reliable coolant flow.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCrankcase Breather Port:\u003c\/strong\u003e Smaller 3\/4″-16 SAE (-8AN ORB) port included for breather function, not water.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpace Savings:\u003c\/strong\u003e Eliminates OEM water pump housing, freeing room in the engine bay for turbo or accessory upgrades.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSerious Performance Focus:\u003c\/strong\u003e Not compatible with A\/C; designed for high-performance street and race applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\n\u003ch4\u003eWhy Delete Your Water Pump Housing?\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFree Horsepower:\u003c\/strong\u003e Eliminates parasitic drag from the mechanical water pump, increasing horsepower and torque.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrevents Cavitation:\u003c\/strong\u003e Electric water pumps avoid cavitation at high RPM, improving coolant flow and engine reliability.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBetter Cooling Control:\u003c\/strong\u003e Programmable or manually controlled pump operation keeps engine temperatures consistent, even while idling or after shutdown.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Bay Space:\u003c\/strong\u003e Removing the OEM water pump housing frees space for turbo setups, superchargers, or other aftermarket components.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReduced Mechanical Complexity:\u003c\/strong\u003e Fewer moving parts mean less potential for mechanical failure from belts, pulleys, or the water pump itself.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlexible Alternator Options:\u003c\/strong\u003e Upgraded bracket allows use of high-output alternators for street or race applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\n\u003cp\u003eThe TracTuff K20\/K24 Water Pump Housing Delete offers flexibility with alternator choice and belt routing. While belts are not included due to variations in crank and alternator pulley sizes, the included tensioner allows for a wide adjustment range, and an XL Tensioner Turnbuckle is recommended if your setup reaches maximum extension. All pivot hardware is grade 12.9, torqued to exact specifications to ensure safe, reliable operation.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003eOptimize your K-series engine for free horsepower, improved cooling efficiency, and a cleaner engine bay with the TracTuff K20\/K24 Water Pump Housing Delete. This premium kit is ideal for enthusiasts seeking a reliable, high-performance solution that delivers both street and track-ready results.\u003c\/p\u003e\n\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n 2002-2006 Acura RSX\u003cdiv\u003e2004-2008 Acura TSX\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 CR-V\u003c\/div\u003e\n\u003cdiv\u003e2003-2011 Honda Element\u003c\/div\u003e \n\u003c\/li\u003e\n\n\n\n\n\u003cli id=\"TechnicalData\"\u003e\nNot Compatible with Air Conditioning\n\u003c\/li\u003e\n\n\n\n \n\u003cli id=\"Included\"\u003e\n(1) Water Pump Housing Delete Plate\u003cdiv\u003e(1) Alternator Bracket\u003c\/div\u003e\n\u003cdiv\u003e(1) Alternator Bracket Turnbuckle\u003c\/div\u003e\n\u003cdiv\u003e(1) Alternator Bracket Bolt \u0026amp; Nut\u003c\/div\u003e\n\u003cdiv\u003e(4) Mounting Bolts\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":"TracTuff","offers":[{"title":"Default Title","offer_id":44521795289122,"sku":"TUF-TT-K20AWPD-16-S","price":274.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/TUF-TT-K20AWPD-16-S_3crop.jpg?v=1763063450"},{"product_id":"honda-k20z3-egr-passage-18712-rra-a00","title":"Honda K20Z3 EGR Passage\/Water Neck 18712-RRA-A00","description":"\u003cul\u003e\n\u003cli\u003eGenuine Honda Product \u003c\/li\u003e\n\u003cli\u003eDirect Factory Replacement Part \u003c\/li\u003e\n\u003cli\u003eFits K20Z3 Engines \u003c\/li\u003e\n\u003cli\u003eIdeal for Maintenance, Engine Rebuilds, or Restorations \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 K20Z3 EGR Passage \/ Water Neck (18712-RRA-A00)\u003c\/h3\u003e\n\n\u003cp\u003eSKU: OHA-18712-RRA-A00. This is the OEM K20Z3 EGR passage, also known as the Civic Si EGR water neck. Honda used it on the 2006 to 2011 Civic Si with the K20Z3, so if you are chasing the right 06-11 Civic Si water neck, this is the factory part. It pulls double duty as a K20Z3 coolant passage part and a K20Z3 EGR system component, it routes coolant through the Honda K20Z3 coolant neck and gives the EGR setup the ports it needs. When the sealing surface gets pitted, corrosion builds up, or the neck stays crusty no matter how much you scrub, a K20Z3 water neck replacement stops being a maybe.\u003c\/p\u003e\n\n\u003cp\u003eWhat you actually notice on the car looks boring but annoying. Coolant weeping at the gasket, hoses that never quite clamp down right, or the slow mystery loss that makes you recheck every clamp, twice. A fresh OEM Honda water neck K20Z3 puts you back on known good fitment with the factory hoses and hardware, which matters when you want it to seal the first time..\u003c\/p\u003e\n\n\u003cp\u003eIf you are doing a clean build, this also helps the engine bay look right. Think showroom quality, clean silver finish, no stained casting, no corrosion freckles. Pair it with the \u003ca href=\"https:\/\/www.hybrid-racing.com\/products\/honda-k-series-egr-passage-gasket-18714-raa-a01?_pos=1\u0026amp;_psq=egr+\u0026amp;_ss=e\u0026amp;_v=1.0\" target=\"_blank\"\u003eEGR Passage Gasket\u003c\/a\u003e, \u003ca href=\"https:\/\/www.hybrid-racing.com\/products\/honda-egr-valve-gasket-18715-pb2-000?_pos=3\u0026amp;_sid=d33301b9e\u0026amp;_ss=r\" target=\"_blank\"\u003eEGR Valve Gasket\u003c\/a\u003e, and \u003ca href=\"https:\/\/www.hybrid-racing.com\/products\/honda-exhaust-gas-recirculation-valve-cover-egr-18711-pm1-j00?_pos=2\u0026amp;_sid=d33301b9e\u0026amp;_ss=r\" target=\"_blank\"\u003eEGR Valve Top Plate\u003c\/a\u003e if you want the whole area refreshed, not half done.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eOEM Honda water neck K20Z3, direct fit Civic Si EGR water neck\u003c\/li\u003e\n  \u003cli\u003eOne housing handles the Honda K20Z3 EGR passage and the coolant routing, it is the Honda K20Z3 cooling part that ties both jobs together\u003c\/li\u003e\n  \u003cli\u003eRestores proper coolant flow through the Honda K20Z3 coolant neck, which helps keep temps consistent when your old neck leaks or restricts\u003c\/li\u003e\n  \u003cli\u003eDirect replacement for the Honda Civic Si EGR fitting and K20Z3 engine water neck assembly\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\u003c\/ul\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\n\n \n\u003cli id=\"Included\"\u003e\n(1) EGR Coolant Passage\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":44748342493218,"sku":"OHA-18712-RRA-A00","price":142.63,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/honda-k20z3-egr-passage-water_gfs4.jpg?v=1768603879"},{"product_id":"honda-k20z3-bypass-inlet-hose-19504-rac-000","title":"Honda K20Z3 Bypass Inlet Hose 19504-RAC-000","description":"\u003cul\u003e\n\u003cli\u003eGenuine Honda Product \u003c\/li\u003e\n\u003cli\u003eDirect Factory Replacement Part \u003c\/li\u003e\n\u003cli\u003eInstalls Under Intake Manifold \u003c\/li\u003e\n\u003cli\u003eCompatible with K20Z3 Engines \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 K20Z3 Bypass Inlet Hose 19504-RAC-000\u003c\/h3\u003e\n\n\u003cp\u003e\nIf you’re going through the cooling system on an 8th gen Civic Si, don’t ignore the little stuff. This Honda K20Z3 bypass hose, Honda 19504-RAC-000 hose, is the coolant bypass hose that keeps coolant moving where it needs to, so your temps stay predictable instead of creeping up at the worst time.\n\u003c\/p\u003e\n\n\u003cp\u003e\nThis is a factory K20Z3 hose replacement for the 2006 to 2011 Honda Civic Si K20Z3. After years of heat cycles, the Si K20Z3 rubber hose can go soft, swell, or get brittle, and that’s when you get the annoying slow seep that leaves crusty residue but never drips on the ground. Swap it while you’re in there and you avoid the classic “why is my overflow low again” problem later.\n\u003c\/p\u003e\n\n\u003cp\u003e\nBecause it’s molded like the Honda OEM bypass hose, you get a K20Z3 hose direct fit with the right bends, no kinks, no fighting it onto the fittings. That matters for flow and for longevity, since the hose doesn’t sit preloaded or rubbing on something sharp. If you’re doing maintenance, tracking down a leak, or freshening a K series, this civic si bypass inlet hose belongs on the list. We run these same OEM style pieces on our own cars because they fit right and they don’t turn into a science project.\n\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eHonda Civic Si K20Z3 hose\u003c\/li\u003e\n  \u003cli\u003eSupports proper circulation in the cooling system hose layout\u003c\/li\u003e\n  \u003cli\u003eMolded rubber shape for clean fit and fewer stress points\u003c\/li\u003e\n  \u003cli\u003eDirect swap for an aging OEM Civic Si bypass hose\u003c\/li\u003e\n  \u003cli\u003eGood call for a K20Z3 engine hose replacement during a coolant service\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\n\u003cstrong\u003eFits the following vehicle:\u003c\/strong\u003e\u003cbr\u003e\n2006–2011 Honda Civic Si (K20Z3)\n\u003c\/p\u003e\n\n\u003cp\u003e\nSKU: OHA-19504-RAC-U00. If you want a no drama fix, this Honda k20z3 inlet hose is the right move. It’s the kind of 8th gen civic coolant hose you replace once and stop thinking about, which is exactly the point.\n\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\n\n \n\u003cli id=\"Included\"\u003e\n(1) Bypass Inlet Hose\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":44779067506722,"sku":"OHA-19504-RAC-U00","price":8.53,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/OHA-19504-RAC-U00_53r8.jpg?v=1769549771"},{"product_id":"koyo-radiator-racing-radiator-for-honda-civic-06-11","title":"Koyo Aluminum Radiator for 06-11 Honda Civic Si","description":"\u003cul\u003e\n\u003cli\u003eCompatible with 06-11 Civic Si \u003c\/li\u003e\n\u003cli\u003eAircraft-Grade Aluminum Construction \u003c\/li\u003e\n\u003cli\u003eDirect Factory Replacement Part \u003c\/li\u003e\n\u003cli\u003eImproved Cooling Performance Over Stock \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\u003eKoyo Racing Radiator - 2006-2011 Honda Civic Si\u003c\/h3\u003e\n\n\u003cp\u003eTracking your 8th gen Civic Si and watching your coolant temps climb to 230°F by the third session? Your stock radiator can't keep up when you're beating on your car. The Koyo Racing radiator's an all-aluminum upgrade that cools way better than your factory plastic-tank radiator. I've been running Koyo radiators in my track Hondas for years because they actually keep temps stable during back-to-back sessions. Your factory radiator's fine for cruising around town, but put it through three 20-minute sessions on a 90°F day and your temps are creeping into the danger zone. The Koyo radiator's got more core volume and all-aluminum construction, so it dissipates heat faster. It's a direct bolt-in, you're using your factory mounts and hoses. If you're doing track days and you're tired of watching your temp gauge climb, this radiator fixes it.\u003c\/p\u003e\n\n\u003ch4\u003eHere's Why Your Stock Radiator Can't Handle Track Use\u003c\/h4\u003e\n\n\u003cp\u003eYour factory 8th gen Si radiator's designed for street driving with occasional highway pulls. The core's sized for normal driving conditions, not sustained high-RPM use with full cooling system load. When you're on track running 6000-8000 RPM for 20 minutes straight, your engine's generating way more heat than it does on the street. Your coolant temps start at 195-200°F and by lap 5 or 6 they're at 220-230°F. That's when your ECU starts pulling timing to protect the engine. You're losing 5-10 horsepower from timing pull, and if temps keep climbing past 235°F, you're risking head gasket failure or warping your aluminum head. I've seen people cook K series motors at the track because their cooling system couldn't keep up. The Koyo radiator's got a thicker core with more surface area, so it can reject more heat. Your temps stay at 200-210°F even after multiple sessions.\u003c\/p\u003e\n\n\u003ch4\u003eAircraft-Grade Aluminum with TIG Welding\u003c\/h4\u003e\n\n\u003cp\u003eKoyo makes this radiator from aircraft-grade aluminum (probably 3003 or 6061 alloy, they don't specify which). The entire radiator's aluminum, tanks and cores, no plastic. Your factory radiator's got plastic end tanks that get brittle from heat cycling and eventually crack. I've replaced factory radiators that developed cracks in the plastic tanks after 100k miles or heavy track use. The Koyo radiator's TIG welded (Heli-arc welding) instead of crimped together like factory radiators. TIG welds are way stronger and they won't leak from vibration or heat cycling. The core uses Nocolok brazing to bond the tubes and fins together. Nocolok brazing's a furnace process that creates a molecular bond between the aluminum parts. It's stronger than soldering and it doesn't fail from heat like solder joints can.\u003c\/p\u003e\n\n\u003ch4\u003eMore Core Volume Means More Heat Rejection\u003c\/h4\u003e\n\n\u003cp\u003eThe Koyo radiator's got a thicker core than your factory radiator. I don't have exact measurements, but eyeballing it, the Koyo core's probably 30-40mm thick compared to 25-30mm for the stock radiator. More core thickness means more coolant capacity and more surface area for heat exchange. The tubes and fins are also designed for better airflow. When you're moving at speed on track, the radiator's getting tons of airflow through the core. That airflow removes heat from the coolant way faster than your factory radiator. You'll see the difference immediately, temps drop 10-15°F under the same conditions compared to stock.\u003c\/p\u003e\n\n\u003ch4\u003eDirect Bolt-In Using Factory Mounts\u003c\/h4\u003e\n\n\u003cp\u003eThe Koyo radiator bolts in using your factory radiator mounting points. You're unbolting your old radiator, dropping the Koyo radiator in, and bolting it up. Your factory upper and lower radiator hoses connect to the Koyo radiator in the same spots as the stock radiator. Your cooling fans bolt to the Koyo radiator the same way they bolted to your stock radiator. The whole swap takes about an hour if you're taking your time. No cutting, no fabricating, no custom mounts. It's a direct replacement.\u003c\/p\u003e\n\n\u003ch4\u003eWhat You Get\u003c\/h4\u003e\n\n\u003cul\u003e\n  \u003cli\u003eKoyo Racing all-aluminum radiator\u003c\/li\u003e\n  \u003cli\u003eAircraft-grade aluminum construction (tanks and core)\u003c\/li\u003e\n  \u003cli\u003eTIG welded (Heli-arc) tanks\u003c\/li\u003e\n  \u003cli\u003eNocolok brazed core\u003c\/li\u003e\n  \u003cli\u003eThicker core than stock (increased cooling capacity)\u003c\/li\u003e\n  \u003cli\u003eDirect bolt-in replacement (uses factory mounting points)\u003c\/li\u003e\n  \u003cli\u003eCompatible with factory radiator hoses and cooling fans\u003c\/li\u003e\n  \u003cli\u003eSignificantly better cooling than stock radiator\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, FA5\/FG2 chassis)\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 This radiator's designed for street and track use. It's way better than your factory radiator, but it's not a full race radiator with a massive core and dual electric fans. If you're doing serious endurance racing with 60+ minute sessions back to back all day, you might need an even bigger radiator or upgraded cooling fans. For most track day and time attack use, the Koyo radiator's more than enough. When you're installing this radiator, flush your entire cooling system first. Don't just drain the old coolant and refill. Run a cooling system flush through the engine, flush it out with water, then fill with fresh Honda OEM Blue coolant (part number \u003ca href=\"https:\/\/www.hybrid-racing.com\/products\/honda-type-2-anti-freeze-engine-coolant-ol999-09011?_pos=1\u0026amp;_sid=7e2788487\u0026amp;_ss=r\" target=\"_blank\"\u003eOL999-9011\u003c\/a\u003e). Don't use cheap Prestone or AutoZone coolant. Use OEM Honda coolant. It's formulated for aluminum engines and it won't corrode your cooling system. Bleed your cooling system after you fill it. There's a bleeder screw on top of your thermostat housing. Open it while you're filling the radiator, and close it when coolant comes out with no bubbles. If you don't bleed properly, you'll get air pockets and your temps will spike even with the new radiator. Check your radiator hoses while you've got the radiator out. If your upper or lower hose is cracked, soft, or bulging, replace it. Old hoses can collapse under suction and restrict coolant flow.\u003c\/p\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n \u003cspan class=\"tag\"\u003e2006-2011 Honda Civic Si\u003c\/span\u003e \n\u003c\/li\u003e\n\n\n\n\n\u003cli id=\"TechnicalData\"\u003e\nOverall Dimensions: 27.5\" L x 18.5\" T x 3.6\" W\u003cdiv\u003eCooling Surface Dimensions: 26.5\" L x 14.5\" T x 3.6\" W\u003c\/div\u003e\n\u003c\/li\u003e\n\n\n\n \n\u003cli id=\"Included\"\u003e\n(1) Aluminum Radiator\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":"Koyo","offers":[{"title":"Default Title","offer_id":45065524445218,"sku":"KOY-V2926","price":384.8,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/KOY-V2926_uu6v.jpg?v=1774907896"}],"url":"https:\/\/www.hybrid-racing.com\/collections\/civic-si-2006-2011-cooling.oembed","provider":"Hybrid Racing","version":"1.0","type":"link"}