Hinson Clutches are championship proven by almost every major factory team in the world, including Team HRC Honda, Team Monster Energy Kawasaki, Team RedBull Ktm, and the Yamaha Factory MXGP Team.. Includes Billetproof® Clutch Cover, Inner Hub, Pressure Plate, Spring, Fiber and Steel Plates. Used by most 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 hard coated for five times the wear resistance to stock (with proper maintenance). Allows clutch assembly to spin truer creating less heat when clutch is disengaged and providing a more positive smooth clutch engagement. Helps eliminate clutch chatter.