Clutch Masters 04-08 Subaru WRX Sti 2.5L Eng. 6-Spd (3300 lbs) FX200 Clutch Kit
The Clutch Masters FX200 kit (15017-HDKV) is a long-life street clutch for the 2004-2008 Subaru WRX STI with the 2.5L turbo engine and six-speed manual. It is the kit to look at when your STI's clutch is slipping on boost in third and fourth, the engagement point has moved high on the pedal, or you have added an intake, exhaust and a mild tune and want a clutch that lasts far longer than the factory one without making the car miserable in traffic.
In the STI, the clutch has to hold the turbo 2.5L's torque as boost comes in, and it is the part that takes the abuse from launches and quick shifts. The FX200 pairs the Clutch Masters Power Plus I heavy-duty pressure plate with a steel-backed Kevlar disc. Clutch Masters rates it at 70 percent more holding capacity than stock, about the same grip as its FX100 organic kit, but says the Kevlar disc lasts two to three times longer. The material is non-abrasive, so it does not score the flywheel or pressure plate face, and the disc rides on a Marcel spring wafer with a heavy-duty sprung hub (or rigid hub where applicable) for smooth, factory-like engagement. Pedal effort rises only slightly. Clutch Masters describes it as the smoothest-engaging stage it sells and aims it at drivers who drive hard but run simple bolt-ons. The 3300 lbs in the listing title is the vehicle weight class the kit is listed under; the STI sits in that range.
Load-test the car in fourth gear from low rpm at full throttle and watch whether engine speed runs ahead of road speed as boost comes in. Check the clutch fluid level and the slave cylinder for leaks first, since a hydraulic problem can feel like a worn disc. If you are unsure whether the slip is in the clutch or elsewhere in the driveline, our slipping diagnosis guide covers how to separate them, and the rebuild vs replace guide helps if the gearbox itself is also making noise.
We list this kit for the 2004-2008 WRX STI 2.5L six-speed. The Clutch Masters application chart for 15017-HDKV is wider: it shows the WRX STI 2.5L turbo six-speed from 2004 through 2021 and the 2006-2009 Legacy GT spec.B 2.5L turbo six-speed. It does not fit the five-speed WRX. Because Subaru made running changes over that long span, send us your year and VIN if your car is outside 2004-2008 or has had the transmission or flywheel changed, and we will confirm before you order. Other clutch and rebuild parts are in the rebuild kits collection.
If your flywheel is beyond resurfacing, a 15 lb steel STI flywheel is a common replacement during this job. For cars with more boost or a big tune, look at the FX250 kit for the STI or the FX350 kit, which step up holding capacity.
| Brand | Clutch Masters |
| Part number | 15017-HDKV |
| Fits | Clutch Masters 04-08 Subaru WRX Sti 2.5L Eng. 6-Spd (3300 lbs) FX200 Clutch Kit |
| Vehicle fitment | Subaru Wrx Sti (2004-2008) |
| Type | Clutch Kits - Single |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Clutch Masters rates both at about 70 percent more holding capacity than stock. The FX200 uses a Kevlar disc instead of organic, which the maker says lasts two to three times longer and does not score the flywheel.
We list it for 2004-2008, but the Clutch Masters chart for 15017-HDKV covers the WRX STI 2.5L six-speed from 2004 through 2021 and the 2006-2009 Legacy GT spec.B six-speed. Send us your VIN and we will confirm.
It is aimed at simple bolt-ons and a mild tune. If you have a bigger turbo, more boost or plan track launches, the FX250 or FX350 kits for the STI hold more torque.
Not necessarily. The kit does not include one, so have the factory flywheel resurfaced if it is in good shape, or replace it if it is cracked, warped or worn below spec.
Yes. Drive gently for the first few hundred miles with no hard launches or full-boost shifts so the Kevlar disc beds in to the flywheel and pressure plate.
