F1 Racing Stage 2 Clutch Kit F1-56006R1-SS Provides a smooth engagement yet it can holds 50%+ more power over stock clutches Carbonized Kevlar friction material is used on all Stage 2 clutch kit to have higher burst strength and heat tolerance Heavy-duty sprung center with heat treated springs and retainer rivets to increase strength and reliability. Horsepower Rating: 258 HP, Torque Capacity: 231 ft/lbs Disc OD: 225mm, Spline: 21