The Revelry Racing CNC Ported “Big Valve” cylinder head increases intake flow 37.9% and exhaust flow 36.9% over stock cylinder head.
This is a CNC big valve conversion of a new Genuine Royal Enfied cylinder head & throttle body adapters.
Includes 8 new valves and 8 new seats all fitted and seats cut. (no seals or springs)
Requires a new head gasket (included with S&S big bore kit) and new cylinder head bolts (not included).
NOTE: To have a your existing cylinder head and throttle body adapters processd order RR-CNC-650-TWIN-BV-CONV.