Design improves clutch performance and heat dissipationPrecision machined from T-6 billet aircraft quality aluminumHard anodized for longer wear resistance than OEM designSuperior tensile strength and hardnessAdvanced design allows clutch assembly to spin true, creating less heat when clutch is disengagedCome with button-type screws to mount the stock ring gearMade in the U.S.A.Steel plates, friction plates, and springs sold separately.