Complete 210cc LS1 Enforcer Aluminium Cylinder Heads, Each AFR1501

64cc Combustion Chamber. Suit Chev LS1/LS2/LS6

AFR1501

R1501

AFR's 210 LS1/LS2/LS6 Enforcer Cylinder Heads feature our Permanent Mold "As-Cast" Technology surfaces on the intake runners, exhaust runners and combustion chambers that allows for extremely accurate and repeatable port location/performance. This budget friendly head is perfect for your OEM engine operating below 6300 RPM. They come fully assembled with the identical components found in our higher end CNC ported cylinder heads; such as PAC Racing springs, viton valve seals, machined bead valve locks (not stamped), hardened spring seats and our one piece 8mm 21 4N Stainless Steel valves. They are available without any parts for the DIY. Sold as a single piece, 2 are required per engine. Included Components: As Cast Combustion Chambers As Cast Exhaust Ports As Cast Intake Ports 3-angle Valve Job 8mm Bead Lock Intake Valve, 2.020" x 4.900" Overall Valve Length 8mm Bead Lock Exhaust Valve, 1.600" x 4.900" Overall Valve Length PAC Racing Spring 1.290" OD Hydraulic Roller Dual Valve Spring, 140 lbs on seat, .600" maximum lift, Max RPM 6300-6500 7° Chrome Moly Retainers 1.245" O.D x .885" I.D x .655" I.D 7° Bead Lock Valve Keepers Viton Valve Seals .620" O.D x .490" I.D Hardened Valve Spring O.D Locator 1.380" O.D x .570" I.D