F1 Racing Stage 2 Rigid Clutch Kit F1-56017R2-SS Provides a smooth engagement yet it can holds 50%+ more power over stock clutches Carbonized Kevlar friction material is used for higher burst strength and heat tolerance Heavy-duty sprung center with heat treated springs and retainer rivets to increase strength and reliability Horsepower Rating: 324 HP, Torque Capacity: 319 ft/lbs Disc OD: 232mm, Spline: 21