Clutch Masters FX400 Clutch Kit for 2004 – 2021 Subaru WRX STI
Even with basic bolt on mods the EJ25 motor in your STI will be getting close to 300HP or even more with some of the newer models of STI’s. At this power level the stock clutch becomes incapable of supporting the upgrades and more aggressive driving from track days. The FX400 clutch kit for the STI offer a 170% increase in holding capacity over factory clutch and is a must have to put the power to the ground for any track ready STI.
The FX400 System uses the Power Plus I, Hi-Leverage, High Rev Pressure Plate with a custom and extremely durable sprung ceramic disc. This clutch is engineered for street driven vehicles and is specifically designed for extended wear and additional clamping force for the enthusiast who has modifications such as an exhaust and or intake system, up to 100hp NO2, upgraded turbo kit, and one of our infamous Brewed tunes. It features increased pedal pressure over factory and slight clutch chatter is common and normal with this clutch kit due to increased holding capacity.
FX400 clutch kit includes:
- Heavy-Duty 6 Puck Ceramic Button Disc
- Heavy-Duty Sprung Hub
- OEM or better Release Bearing
- Pilot Bearing
- Alignment Tool
- Instruction Card
**The difference between the High Rev pressure plate and the Heavy Duty pressure plate of 15017-HRC6 is the High Rev kits have an even stronger and reinforced pressure plate to withstand higher RPM’s for your built EJ25’s.**