Used by all major factory teams and riders. | Improves clutch performance and life. | Improves heat dissipation. | Precision machined from billet T-6 aircraft quality aluminum to aerospace tolerances, and Akadized for five times the wear resistance to stock* (*with proper maintenance) | Allows clutch assembly to spin more true creating less heat when clutch is disengaged. | Helps eliminate clutch chatter when used with Hinson Clutch Components clutch basket and inner hub. | Made in the USA.