Used by all major factory teams and ridersImproves clutch performance and lifeImproves heat dissipationPrecision machined from billet T-6 aircraft quality aluminum to aerospace tolerances, and hardcoated for five times the wear resistance to stock* (*with proper maintenance)Allows clutch assembly to spin more true creating less heat when clutch is disengagedWhen used with Hinson Clutch Components clutch basket and inner hub helps eliminate clutch chatterNote: **requires ’89 update kit **8-plate kit must use Hinson B, IH, PP & C