Afr Chevy 210cc Enforcer As-Cast Ls1 Cylinder Head, 64cc Chambers, Bare, No Parts

AFR's 210 LS1 Enforcer Cylinder Head features their Permanent Mold “As-Cast” Technology surfaces on the intake runners, exhaust runners and combustion chambers that allow for extremely accurate and repeatable port location/performance. This budget-friendly head is perfect for your 3.780" Bore OEM engine operating below 6300 RPM. They come fully assembled with the identical components found in their higher-end CNC ported cylinder head; such as PAC Racing springs, Viton valve seals, machined bead valve locks (not stamped), hardened spring seats and ductile iron seats (not powdered metal) their one-piece 8mm 21 4N Stainless Steel valves. They are available without any parts for the DIY. Sold as a single piece, 2 pieces required per engine. These heads are bare part number for fully assembled #AFR 1506
The all-new LS1 210cc Enforcer Cylinder Head feature 2.020" intake valves, 1.600" exhaust valves and come assembled with their 8017 springs for hydraulic roller camshafts. Designed to work with the factory GM stand and rockers they will support up to a 0.600" lift camshaft and up to 6,500 RPM. Basic Package Components Part # As-Cast Combustion Chambers
As-Cast Exhaust Ports
As-Cast Intake Ports
3-angle Valve Job  
Specifications, Features, and Optional Supporting Components Head Material A356 Aluminum Intake Port Volume 210cc Intake Port Dimension 3.190"H x 1.015"W x5/16 top 3/8" bottom Intake Port Location Stock Exhaust Port Volume 82cc Exhaust Port Dimension 1.400" H x 1.660" W Exhaust Port Location Stock Combustion Chamber Size 64cc Valve Angle 15°
Valve Spring Pocket Diameter 1.500" O.D Max Valve Spring Pocket Machining 1.500" O.D Deck Thickness 0.425" Minimum Bore Diameter 3.780" Spark Plug Dimensions 14mm x .750" w/Tapered seat Head Gasket Factory GM LS2 Intake Port Gasket GM or FAST Exhaust Port Gasket GM#12558573 Head Bolts (97-03) AFR #6330 Head Studs (97-03) AFR #6331 Head Bolts (04+) AFR #6334 Head Studs (04+) AFR #6335 Head Bolt Washers, Manley AFR #6320 Suggested Manifold FAST 90mm, 92mm, or 102mm Flat Mill .006" per cc 58cc Maximum Spark Plug Starting Range NGK TR55  Important: Do not port match you intake manifold to any Fel-Pro gasket as it does not precisely match an AFR head.
Warning:Do not machine spring pad any deeper.
Note: Milling head deck will affect flow numbers.