High Performance And Lighter Weight To Free Additional Horsepower. Military Spec Fasteners For Reliability And Strength. Bolt-on Replaceable Friction Plate. Stepped Dowels On Most Applications. Billet 6061 T6 Or 2024 T4 Aluminum Body. Replaceable Hardened 1050 Steel Ring Gear. Lower MOI For Faster Throttle Response. 40-60 Percent Lighter Than Stock For Quicker Acceleration. Heat Treated Friction Plate For Optimum Grip And Long Life.