F1 Racing Stage 2 Performance Clutch Kit F1-53218R1-SS Provides a smooth engagement yet it can holds 50%+ more power over stock clutches Direct replacement clutch kit thus no modifications are needed and the clutch kit includes only the highest grade components from world's leading high-performance clutch part manufacturers Carbonized Kevlar friction material for higher burst strength and heat tolerance Disc OD: 240mm Spline: 23