Competition Clutch 2.4L K Series Stage 3 - Ceramic Sprung Clutch Kit w/Flywheel
Competition Clutch 8090-ST-2600 is a Stage 3 clutch and flywheel package for Honda's K-series manual cars, the platform behind the Acura RSX, the first-generation TSX and the 2002 to 2011 Civic Si. It is the kit K20 and K24 owners shop for when a stock or Stage 1 clutch slips behind a K24 bottom end, a turbo, or a built motor, and they want one box with the clutch and flywheel already matched.
The 8090 kit is a 230 mm upgrade, larger than the clutch these cars came with, and that extra friction area is a big part of why it holds more torque. Competition Clutch pairs a performance pressure plate with a high-torque sprung disc using segmented ceramic facings. The maker describes Stage 3 as a street and strip setup with quick but smooth engagement and up to a 150 percent increase in torque capacity, measured at the wheels and depending on the car. The sprung hub keeps launch shock and chatter down compared with a rigid puck disc.
The ST in the part number refers to the steel flywheel version. Catalog notes for this kit list a 16 lb flywheel, pressure plate bolts and the throwout bearing hardware with the clutch, plus the alignment tool. Because the flywheel is matched to the 230 mm clutch, you do not reuse your factory flywheel with this kit.
Do a top-gear roll-on from low rpm with the throttle pinned. If the tach climbs ahead of the speedometer, the clutch is slipping. Before you blame the clutch, check that the master and slave cylinders are not holding pressure on the fork, which mimics slip, and that oil is not leaking from the rear main seal into the bellhousing. Our slipping diagnosis guide and the flare versus slip explainer help sort out the cause.
The maker catalogs this kit for the 2002 to 2006 Acura RSX, 2004 to 2008 Acura TSX and 2002 to 2011 Honda Civic Si, manual transmission only. Our title calls it a 2.4L K-series kit because it is a common pick for K24-powered and K-swapped builds. On a swap, the transmission and the crank you are bolting to decide fitment more than the chassis does, so send us your engine code, transmission code and year or VIN and we will confirm before it ships. Automatic cars are not covered, and the 2012 to 2015 Civic Si with the K24Z7 is not on the maker's list for this part number. More options sit in our rebuild kits category.
On a Civic Si or TSX 2.4 that only needs moderate holding power, the ACT AR2-XTSS street kit is an alternative.
| Brand | Competition Clutch |
| Part number | 8090-ST-2600 |
| Fits | Competition Clutch 2.4L K Series Stage 3 - Ceramic Sprung Clutch Kit w/Flywheel |
| Type | Clutch Kits - Single |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Yes. It is the steel flywheel version of the 230 mm upgrade kit, and catalog notes list a 16 lb flywheel with the clutch, bolts and throwout bearing.
It is widely used on K24 builds, but fitment depends on your crank and transmission. Send us the engine code, transmission code and chassis year and we will confirm before shipping.
The maker lists the 2002-2006 Acura RSX, 2004-2008 Acura TSX and 2002-2011 Honda Civic Si with a manual transmission.
Competition Clutch rates its Stage 3 kits for up to a 150 percent increase in torque capacity at the wheels, depending on the application.
Yes. Plan on about 300 miles of normal driving with no launches or hard pulls so the ceramic facings and flywheel face seat together.
