Spec 06-10 Subaru WRX/07-10 Legacy GT (including Spec B) Stage 3 Clutch Kit
The SPEC SU203 is the Stage 3 clutch for the 2006-2010 Subaru WRX and 2007-2010 Legacy GT, built for EJ255 turbo cars that have outgrown a Stage 2. SPEC rates it at 445 ft-lb, which suits a WRX or LGT with a larger turbo, ethanol tune or regular drag-strip launches, where an organic or Kevlar disc keeps slipping or overheating.
In these cars the clutch feeds turbo torque into a five-speed transaxle that drives all four wheels, so there is no wheelspin to relieve a hard launch. Every bit of shock goes through the disc. SPEC's Stage 3 disc is a six-puck carbon semi-metallic design, which holds through heat and clamps harder than the Kevlar Stage 2. That is where the extra capacity comes from: SPEC rates the SU203 at 445 ft-lb against 375 ft-lb for the SPEC SU202 Stage 2 kit for the same cars. The trade-off is engagement. Pucks grab quickly and have less slip range, so pulling away on a hill or creeping in traffic takes more care. Choose the SU203 when power or launches call for it, not just for daily driving.
Run a fourth-gear pull from about 2,500 rpm and watch whether engine speed outruns road speed when boost arrives. If it does, the disc is slipping. A clutch that drags or grinds going into gear is a different fault: check fluid level, bleed the hydraulics and inspect the slave cylinder before replacing anything. Oil on the bellhousing points to a rear main or input seal that must be fixed first. Our slipping diagnosis guide covers the load test, and the flare vs. slip guide separates slip from RPM hang between shifts.
The listing covers the 2006-2010 WRX (non-STI, 2.5 L turbo five-speed) and 2007-2010 Legacy GT. SPEC's application chart for SU203 also lists the 2006 Baja Turbo, 2006-2012 Forester 2.5 turbo, 2007-2011 Legacy 2.5T Limited and GT and 2007-2012 Outback XT. The title includes the Legacy GT Spec B, which came with a six-speed, so Spec B owners should compare disc diameter and spline with the old clutch or send us the year and VIN first. SPEC's chart runs the WRX row to 2017, but our listing covers 2006-2010, and the 2015-on WRX has a different engine and a six-speed, so check later years with us first. The STI uses a different clutch. More options are in the rebuild kits category.
| Brand | SPEC |
| Part number | SU203 |
| Fits | Spec 06-10 Subaru WRX/07-10 Legacy GT (including Spec B) Stage 3 Clutch Kit |
| Vehicle fitment | Subaru Wrx/07-10 Legacy Gt (2006-2010) |
| Type | Clutch Kits - Single |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
The title includes the Spec B, but that model has a six-speed while the other covered cars are five-speeds. Compare disc diameter and spline with your old clutch, or send us the year and VIN before ordering.
SPEC rates the SU202 Stage 2 at 375 ft-lb and the SU203 Stage 3 at 445 ft-lb. Stage 2 is easier in traffic; Stage 3 is for higher power, heavy launches or a Stage 2 that already slips.
SPEC's page does not list kit contents, so we do not promise one. Plan to resurface your flywheel or buy a new one.
No. The STI uses a six-speed and a different clutch. The SU203 is for the non-STI 2.5 L turbo five-speed cars in its application list.
The WRX and Legacy GT clutch hydraulics use brake fluid. Bleed with fresh fluid of the grade marked on the reservoir cap after install.
