Clutch Masters 06-08 Subaru WRX 2.5L Eng. 5-Spd FX400 Clutch Kit 6-Puck
The Clutch Masters 15021-HDC6 is the FX400 6-puck ceramic clutch kit for the 2.5L turbo Subaru WRX with the 5-speed manual, listed here for 2006-2008 cars. This is not a stock replacement. It is for the WRX that has already outgrown an organic or Kevlar clutch: a big-turbo EJ255, an aggressive flex-fuel tune, launches at the drag strip, or a car that cooked its last disc in a season. If your clutch now slips in second or third the moment boost hits, this is the stage built to stop it.
Clutch Masters pairs its Power Plus I Hi-Leverage heavy duty pressure plate with a sprung disc carrying six ceramic pucks. Ceramic holds far more torque and sheds heat much faster than organic facing, and Clutch Masters rates this setup at 170 percent more holding capacity than stock. The sprung hub adds some damping, which makes it more livable than a rigid race disc, but the 6-puck disc has no marcel cushion between its linings. The result is quick, positive engagement and, in Clutch Masters' own words, a tendency to chatter slightly in first and reverse. They call the 6-puck the more aggressive of their two FX400 discs and say it may not be ideal for street-driven cars.
The box includes the pressure plate, the 6-puck ceramic disc, a release bearing, an alignment tool, an instruction card and decals, with a pilot bearing where the application uses one. No flywheel is included. Shipping weight is about 20 lb.
If your WRX is stock or close to it, Clutch Masters says ceramic discs are never recommended there; a milder kit will last longer and drive better.
Do a full-throttle pull in fourth from about 2,500 RPM on a safe road. If the tach races ahead of road speed as the turbo comes on, the disc is slipping. Our slip diagnosis guide covers the test step by step, and flare vs. slip explains what each one feels like. Also check for a clutch fluid leak at the slave cylinder and for oil on the bellhousing; either one can make a good clutch slip.
Our listing covers the 2006-2008 Subaru WRX 2.5L turbo 5-speed. Clutch Masters lists 15021-HDC6 for the 2006-2014 WRX 2.5L turbo 5-speed and the 2007-2012 Legacy and Outback 2.5L turbo GT with the 5-speed. It does not fit the WRX STI 6-speed, the 2002-2005 2.0L WRX, or the 2015-up WRX. If you have a 2009-2014 car, a Legacy GT or a swapped drivetrain, send us the year and full VIN so we can confirm before it ships. The milder FX300 Kevlar kit covers the same cars if you drive mostly on the street.
| Brand | Clutch Masters |
| Part number | 15021-HDC6 |
| Fits | Clutch Masters 06-08 Subaru WRX 2.5L Eng. 5-Spd FX400 Clutch Kit 6-Puck |
| Vehicle fitment | Subaru Wrx (2006-2008) |
| Type | Clutch Kits - Single |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
It can. Clutch Masters says the 6-puck disc has no marcel and engages very quickly, so it may chatter slightly in first and reverse. If daily comfort matters most, look at the FX300 or FX250 instead.
No. The kit includes the pressure plate, disc, release bearing, alignment tool and a pilot bearing where applicable. Resurface your flywheel or add a FW-021 steel or aluminum flywheel.
Clutch Masters lists it for the 2006-2014 WRX 2.5L turbo 5-speed and the 2007-2012 Legacy and Outback 2.5L turbo GT 5-speed. Our listing is written for 2006-2008, so send us your year and VIN for later cars and we will confirm.
No. Clutch Masters says ceramic discs are never recommended for stock or near-stock cars. They are meant to raise holding capacity, not clutch life, and harsh engagement can shorten life in easy street driving.
No. The STI uses a 6-speed and a different clutch. This kit is for the 5-speed 2.5L turbo cars only.
