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.