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 genuine Royal Enfield cylinder head subassembly & throttle body adapter set fully CNC ported with bigger valves.
Includes 8 new valves and 4 new intake 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 your existing cylinder head andthrottle body adapters processed order RR-CNC-650-TWIN-BV-CONV.
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