Clutch Masters 06-09 Subaru WRX 2.5L Turbo 5-Spd FX350 Sprung Fiber Tough Disc Clutch Kit
The Clutch Masters 15021-HDFF is the FX350 clutch kit for the 2.5L turbo Subaru WRX with the 5-speed gearbox, and our listing covers the 2006-2009 cars. It is the kit people land on after the factory clutch, or a mild upgrade, starts letting go behind a tuned EJ255. If your WRX flares RPM in third or fourth as boost comes in, the engagement point has crept up the pedal, or you plan a few track days on a car you still drive to work, the FX350 is built for exactly that mix.
The FX350 pairs the Clutch Masters Power Plus I high-leverage heavy duty pressure plate with a segmented disc faced in Fiber-Tough, a steel-backed friction material Clutch Masters developed to bridge the gap between long-wearing organic and grabby ceramic linings. Segmenting the facing raises the clamp pressure per square inch, so the disc holds more torque without a dramatic jump in pedal effort. Clutch Masters rates the kit at 110 percent more holding capacity than stock and places it a small step above its FX300: slightly more holding, a more aggressive bite, and some chatter. The target is a serious street car that sees occasional weekend track time with a medium-boost turbo setup.
In the box you get the pressure plate, the heavy duty sprung-hub disc with marcel spring wafer, a release bearing, an alignment tool, an instruction card and decals. A pilot bearing is supplied only where the application calls for one. The flywheel is not included.
Do a third or fourth gear pull from low RPM on an empty road and watch the tach. A steady, matching climb in RPM and speed means the disc is holding; a sudden RPM jump once the turbo spools is slip. Our slipping diagnosis guide walks through it, and the flare vs. slip explainer helps separate a clutch issue from a driveline or tune issue. If the pedal feel itself changed, read clutch slipping causes before you order, because a sticking slave cylinder or contaminated disc can mimic a worn one.
This listing is titled for the 2006-2009 Subaru WRX 2.5L turbo 5-speed. Clutch Masters catalogs part number 15021-HDFF for the 2006-2014 WRX 2.5L turbo 5-speed and the 2007-2012 Legacy GT 2.5L turbo 5-speed, so the same kit is used across that range. It does not fit the WRX STI 6-speed, and it is not for the 2002-2005 2.0L WRX, which uses a different clutch. If you have a 2010-2014 WRX, a Legacy GT, or an engine or transmission swap, send us your year and VIN so we can confirm before shipping. Other options for this car are on our clutch and rebuild kits page.
Want smoother manners and less chatter? The FX300 15021-HDTZ is the step below. Making serious power? The FX400 6-puck kit holds more but is far harsher on the street.
| Brand | Clutch Masters |
| Part number | 15021-HDFF |
| Fits | Clutch Masters 06-09 Subaru WRX 2.5L Turbo 5-Spd FX350 Sprung Fiber Tough Disc Clutch Kit |
| Vehicle fitment | Subaru Wrx (2006-2009) |
| Type | Clutch Kits - Single |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Clutch Masters lists this part number for the 2006-2014 WRX 2.5L turbo 5-speed. Our listing is titled 2006-2009, so send us your VIN for a 2010-2014 car and we will confirm fitment before it ships.
No. The STI uses a 6-speed with its own clutch, and the 2002-2005 2.0L WRX uses a different clutch. This kit is for the 2.5L turbo 5-speed WRX and the 5-speed Legacy GT.
Both use the Power Plus I pressure plate. The FX350 uses Fiber-Tough friction instead of Kevlar, which gives slightly more holding capacity and a more aggressive engagement, with some chatter. The FX300 is smoother for daily driving.
No. The kit includes the pressure plate, sprung disc, release bearing, alignment tool, instruction card and decals. Resurface your flywheel or buy a new one before installing.
Clutch Masters says the FX350 will produce some chatter because of its more aggressive friction material. Light chatter on takeoff is expected; heavy shudder points to an install issue such as an unresurfaced flywheel or oil on the disc.
