P22 BOOST/9R Billet primary clutch cover replaces the stock Cast cover which can crack. Lighter than the factory clutch cover and the ONLY cover on the market with propeller style, cupped fan blades designed for maximum air flow. Machined out of 6061 T6 with a serviceable oil impregnated bushing held in with a snap ring. The perfect balance of lightweight, strength, cooling and billet bling