Clutch Masters FX400 (3300lbs) Stage 4 Clutch Kit 6 Puck Subaru STI 2004-2021 | 15017-HDC6 map-enforced If you have a non-OEM

If you have a non-OEM Radiator

ACT spring retainers utilize wraparound spring windows and thicker retainer stampings to provide spring support

and features a boost dial that is easy to adjust yet will not slip causing over boost conditions

Part Number: SKE18-AUB00

ARP head studs are precision manufactured to deliver consistent torque

Clutch Masters FX400 (3300lbs) Stage 4 Clutch Kit 6 Puck Subaru STI 2004-2021 | 15017-HDC6 map-enforced If you have a non-OEMPart #: 15017 HDC6 Heavy duty pressure plate; sprung, 4 or 6 pucked ceramic disc; quick engagement; tremendous holding power. If your STI has major upgrades and is making loads of power and or your STI is a dedicated track car, then you should look at the FX400 clutch from Clutch Masters. You will experience harsh engagement that is not suggested for daily driven cars, but is ideal for the for aggressively driven weekend toy and track driven STI. Did