Proven Moto Performance Cylinder Head Power Kit. The Proven Moto cylinder head port spec has gone through rigorous R&D. It has been flow bench developed as well as tested on the dynamometer and motocross & supercross tracks with professional AMA riders to confirm the best in performance and reliability. The final spec has been digitized and is replicated through CNC machining for the exact same spec every time. The Proven Moto Power Kit is used by professional SX/MX Race Teams & Racers. The Proven Moto Power Kit comes as a fully assembled, CNC Ported OEM cylinder head and includes the OEM valve train and performance modified OEM Intake camshaft. The…