Competition Clutch 04-20 Subaru STi Stage 3 - Segmented Ceramic Clutch Kit
The Competition Clutch 15030-2600 is a Stage 3 street/strip clutch for the six-speed Subaru Impreza WRX STI with the 2.5L turbo engine. It is aimed at STI owners whose tuned or built car has started slipping in third or fourth once boost comes in, whose stock clutch smells hot after a few launches, or who are adding a bigger turbo and want the clutch sorted before the power goes up. Our listing covers the 2004-2020 STI, and the maker's fitment notes are below.
The STI uses a pull-style clutch, where the release bearing pulls the pressure plate diaphragm toward the gearbox instead of pushing it, and Competition Clutch lists this kit specifically for those pull-style applications. The 2600 series is the maker's segmented ceramic step: a single disc with ceramic facings split into segments, paired with a performance pressure plate. Competition Clutch rates it at up to 150 percent more torque capacity than stock and describes the engagement as quick but smooth, built for cars that see both a commute and drag-strip passes. Ceramic friction tolerates heat from repeated hard launches far better than an organic disc, but it grabs harder, so expect a more abrupt take-up than the factory clutch. The kit includes the pressure plate, disc, throwout bearing, pilot bushing and an alignment tool.
Do a steady full-throttle pull in fourth from low RPM and watch the tach against the speedometer. If RPM jumps without the car pulling harder, the clutch is slipping. A boost leak or a tune pulling timing makes the car feel flat without that RPM flare, so log boost during the same pull. Check the clutch hydraulics too: a weak slave or air in the line causes drag and grinding that a new clutch will not fix. Our slipping diagnosis guide and flare vs. slip guide cover reading those symptoms.
Competition Clutch lists the 15030-2600 for the 2004-2014 Impreza WRX STI and the 2015-2021 WRX STI with the 2.5L turbo and six-speed, pull-style clutch. Our listing is titled 2004-2020. It is not for the five-speed WRX, which uses a different clutch. On flywheels the maker's page conflicts with itself: the description mentions a billet steel flywheel, but the specification table says the flywheel is not included. Treat this kit as clutch only and plan for a flywheel. If you are unsure, send us your year and VIN before ordering. More STI clutch parts are in the rebuild kits category.
When the ceramic disc wears out, the 99707-S-2600 replacement disc renews it without buying a full kit.
| Brand | Competition Clutch |
| Part number | 15030-2600 |
| Fits | Competition Clutch 04-20 Subaru STi Stage 3 - Segmented Ceramic Clutch Kit |
| Vehicle fitment | Subaru Sti (2004-2020) |
| Type | Clutch Kits - Single |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
No. Competition Clutch lists it for the six-speed, pull-style WRX STI 2.5L turbo: 2004-2014 Impreza WRX STI and 2015-2021 WRX STI. The five-speed WRX takes a different kit.
Plan on no. The maker's specification table says the flywheel is not included, even though its description text mentions one. Budget for a resurfaced or new flywheel such as the 2-721-ST steel flywheel.
Competition Clutch rates the Stage 3 2600 series at up to 150 percent more torque capacity than the stock clutch. It does not publish a specific ft-lb figure for this kit.
The segmented ceramic disc engages quicker and more abruptly than an organic stock disc. The maker builds it for street and strip use, so it is livable daily but best for modified cars that launch hard.
The kit includes the throwout bearing, pilot bushing and alignment tool. The install sheet also requires a resurfaced or new flywheel, and it is a good time to check the slave cylinder and rear main seal.
Yes. Competition Clutch calls for a 500-700 mile break-in with no abuse before launches or track use.
