{"product_id":"competition-clutch-stage-3-kit-civic-si","title":"Competition Clutch Stage 3 Kit, 17-23 Civic Si","description":"\u003cul\u003e\n\u003cli\u003eStage 3 ceramic clutch, 1.5L Turbo \u003c\/li\u003e\n\u003cli\u003e150% torque capacity increase over stock \u003c\/li\u003e\n\u003cli\u003eST lightweight, STU ultra-lightweight steel flywheel \u003c\/li\u003e\n\u003cli\u003eFlywheel mass 8-18 lbs by application \u003c\/li\u003e\n\u003cli\u003e500-mile recommended break-in period \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\u003eCompetition Clutch Stage 3 Kit, 17-23 Civic Si\u003c\/h3\u003e\n\u003cp\u003eIf the stock clutch in your 2017-2023 Civic Si is slipping every time the 1.5T builds boost in third, the Competition Clutch Stage 3 kit (8091-ST-2600 or 8091-STU-2600) is the complete clutch-and-flywheel fix. Both options use the same Stage 3 segmented ceramic clutch for the Civic Si 1.5L turbo only. The choice is the flywheel: ST lightweight steel or STU ultra lightweight steel. It doesn't fit a non-Si 1.5T Civic, and it doesn't fit a Type R.\u003c\/p\u003e\n\u003ch3\u003eWhat It Is and Why It Works\u003c\/h3\u003e\n\u003cp\u003eThis is Competition Clutch's 2600 Series street\/strip kit with the flywheel in the box. Competition Clutch rates Stage 3 at up to a 150 percent increase in torque capacity over stock. Segmented ceramic holds more heat than the organic Stage 2 disc on the 8091-ST-2100 \/ 8091-STU-2100 kits already in the catalog, so it won't glaze the way a stock Si disc does when you keep it in boost. Engagement is quicker and less polite in traffic. That's the trade-off. Generic Stage 3 copy that mentions a 250 mm plate is template language, not a measured 8091 spec.\u003c\/p\u003e\n\u003cp\u003eST (8091-ST-2600) includes the Lightweight Steel flywheel. Competition Clutch makes ST flywheels from 4140 one-piece steel and recommends ST for naturally aspirated and\/or street use because it preserves low-end torque and driveability. That same flywheel page also says ST is well-suited for Gravity, Stage 1, and Stage 2. This SKU is a Stage 3 kit on a turbo car, so that pairing note doesn't match this application. ST is still the milder, street-oriented steel wheel of the two. STU (8091-STU-2600) includes the Ultra Lightweight Steel flywheel. Competition Clutch recommends STU for forced induction and\/or track and rally, machines it with less material for quicker revving, and lists it as well-suited for Stage 3 and up. That pairing matches this SKU.\u003c\/p\u003e\n\u003cp\u003eCompetition Clutch only publishes flywheel weight as 8 to 18 lbs by application, so no per-SKU mass is claimed here. Each kit includes the pressure plate, the segmented ceramic disc, an alignment tool, a pilot bushing, a throwout bearing, and the chosen steel flywheel. This is a complete kit, not an RK.\u003c\/p\u003e\n\u003ch3\u003eSpecs\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8091-ST-2600, 8091-STU-2600\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHybrid Racing SKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCOC-8091-ST-2600, COC-8091-STU-2600\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStage 3 single-disc clutch kit with steel flywheel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDisc\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCeramic, segmented. Same clutch on both options.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTorque Capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUp to 150 percent increase over stock, per manufacturer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eST flywheel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLightweight steel, 4140 one-piece. Street \/ low-end oriented, per manufacturer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSTU flywheel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUltra lightweight steel. Less material, quicker revving, FI \/ track oriented, per manufacturer.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFlywheel mass\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNot published per SKU. Manufacturer range for steel flywheels is 8 to 18 lbs by application.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eKit Includes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePressure plate, segmented ceramic disc, alignment tool, pilot bushing, throwout bearing, chosen steel flywheel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFlywheel Included\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBreak-In\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e500 street miles recommended, per manufacturer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eAvailable Options\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFlywheel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eST Lightweight Steel\u003c\/td\u003e\n\u003ctd\u003e8091-ST-2600\u003c\/td\u003e\n\u003ctd\u003eCOC-8091-ST-2600\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSTU Ultra Lightweight\u003c\/td\u003e\n\u003ctd\u003e8091-STU-2600\u003c\/td\u003e\n\u003ctd\u003eCOC-8091-STU-2600\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eYear\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eMake\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eTrim\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eEngine\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2017-2023\u003c\/td\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eCivic\u003c\/td\u003e\n\u003ctd\u003eSi (manual)\u003c\/td\u003e\n\u003ctd\u003e1.5L turbo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThis kit is for the 2017-2023 Civic Si 1.5L turbo only. It doesn't fit a non-Si 1.5T Civic, a Civic Type R, or an earlier K20 Civic Si (those are the 8090 and 8037 families). Competition Clutch's page doesn't split 10th-gen vs 11th-gen and doesn't name hatch vs sedan. If your Civic isn't an Si, this isn't your clutch.\u003c\/p\u003e\n\u003ch3\u003eWhat to Know Before You Buy\u003c\/h3\u003e\n\u003cp\u003eBe honest about the flywheel before you order. ST is the street-oriented wheel that Competition Clutch says preserves low-end. STU is the quicker-revving wheel they recommend for boost and track. The clutch disc is the same Stage 3 ceramic either way, so you're not buying more holding power when you step to STU. You're buying less rotating mass and more chatter risk at idle. If you daily the Si in traffic, ST is the one we'd put in our own car. If you track it or you want it to rev like a lighter wheel, take STU.\u003c\/p\u003e\n\u003cp\u003eCeramic engagement is grabby. There's a narrow slip zone, the pedal is heavier than stock, and you'll get some low-speed chatter, especially if you pair it with the STU wheel. Take the 500-mile break-in seriously: normal street driving, no launches, no clutch-slipping heroics until the disc beds into the new flywheel. Skip it and you'll chase engagement problems and blame the kit.\u003c\/p\u003e\n\u003cp\u003eWhile the transmission is out, inspect the rear main seal, the slave cylinder, and the clutch master. A tired hydraulic system behind a stiffer plate feels worse than the clutch itself. If the car is still on a stock tune and you hate traffic, look at the Stage 2 8091 kits we already sell before you commit to ceramic.\u003c\/p\u003e\n\u003c!-- FLAGS\nDEALER MASS \/ FITMENT: Dealers list 22 lb ST and 17 lb STU, 2016-2021 all Civic, 8-puck disc, 240 mm \/ FK8-size, and absolute lb-ft ratings. None of those figures are on Competition Clutch's 8091 kit pages or the flywheel category page (range only: 8-18 lb by application). Copy omits dealer masses, 2016 non-Si coverage, 8-puck, 240 mm, and lb-ft.\nST PAIRING NOTE: CC flywheel page says ST is well-suited for Gravity \/ Stage 1 \/ Stage 2. This SKU is Stage 3 on a turbo Si. Called out in the body.\nPIM FITMENT GAP: Structured fitment is missing 2021 Civic Si (6 of 7 years applied). Manufacturer coverage is 2017-2023 Si. Add 2021.\nHR ALREADY SELLS: 8091-ST-2100 and 8091-STU-2100 (Stage 2).\nBODY BOILERPLATE: 250 mm plate line is reused Stage 3 template. Not treated as a measured 8091 spec.\n--\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n \u003ch3\u003eFitment\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eYear\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eMake\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eTrim\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eEngine\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2017-2023\u003c\/td\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eCivic\u003c\/td\u003e\n\u003ctd\u003eSi (manual)\u003c\/td\u003e\n\u003ctd\u003e1.5L turbo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThis kit is for the 2017-2023 Civic Si 1.5L turbo only. It doesn't fit a non-Si 1.5T Civic, a Civic Type R, or an earlier K20 Civic Si (those are the 8090 and 8037 families). Competition Clutch's page doesn't split 10th-gen vs 11th-gen and doesn't name hatch vs sedan. If your Civic isn't an Si, this isn't your clutch.\u003c\/p\u003e \n\u003c\/li\u003e\n\n\n\n\n\u003cli id=\"TechnicalData\"\u003e\n\u003cp\u003eBoth options use the same Stage 3 segmented ceramic clutch. ST is Lightweight Steel, 4140 one-piece, street oriented per manufacturer. STU is Ultra Lightweight Steel, FI and track oriented. Per-SKU flywheel mass is not published.\u003c\/p\u003e\n\u003c\/li\u003e\n\n\n\n \n\u003cli id=\"Included\"\u003e\n\u003cp\u003ePressure plate, segmented ceramic disc, alignment tool, pilot bushing, throwout bearing, and the chosen steel flywheel (ST or STU). This is a complete kit, not an RK.\u003c\/p\u003e\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\u003cli id=\"InstallGuide\"\u003e\n\u003cp\u003eThis kit includes a flywheel. Install the supplied ST or STU flywheel with new flywheel bolts torqued to the vehicle service spec. Replace the pilot bearing or bushing. Clean rust inhibitor off friction surfaces. Do not over-grease the hub.\u003c\/p\u003e\n\u003cp\u003eA 500 to 700 mile break-in with normal street driving is required per the manufacturer install sheet.\u003c\/p\u003e\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n","brand":"Competition Clutch","offers":[{"title":"ST Lightweight Steel","offer_id":46651051245602,"sku":"COC-8091-ST-2600","price":1300.0,"currency_code":"USD","in_stock":false},{"title":"STU Ultra Lightweight","offer_id":46651051278370,"sku":"COC-8091-STU-2600","price":1500.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/7dfa0f52aaae29cf2ed524a5e40cc8c7L.jpg?v=1788123378","url":"https:\/\/www.hybrid-racing.com\/products\/competition-clutch-stage-3-kit-civic-si","provider":"Hybrid Racing","version":"1.0","type":"link"}