MOFLOW 36/27 BILLET HEAD AND INTAKE- STAINLESS VALVES - SUPPORTS .500" VALVE LIFT WITH NO MODIFICATION - 36MM INTAKE VALVE - 27MM EXHAUST VALVE - DUAL VALVE SPRINGS - TITANIUM RETAINERS - 15CC CHAMBER - WIDER ROCKER SPACING THAN STOCK - FOR 3" BORE ENGINES - FOR BLACK VENOM ROCKERS