AFR's 238 LS3 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.  The AFR 238cc LS3 Enforcer is the first Enforcer casting with 100% AFR design.  With a smaller valve and port, this head outflows your OE LS3 casting by up to 20CFM at low lifts, offering greater performance potential. 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/21-8N Stainless Steel valves. They are available without any parts for the DIY. Sold as a single piece, 2 are required per engine.  Please see footnotes for additional information.

Basic Package Components
100% As Cast Intake, Exhaust, and Combustion Chambers
Competition 5-angle Valve Job
8mm Bead Lock Intake Valve, 2.080" x 5.200" Overall Valve Length	AFR #7241
8mm Bead Lock Exhaust Valve, 1.600" x 5.205" Overall Valve Length	AFR #7212
PAC Racing Spring 1.290" OD Hydraulic Roller Dual Valve Spring, 140 lbs. on seat, .600 maximum lift, Max RPM 6300-6500	AFR #8017
7° Steel Retainers 1.245" O.D x .880" I.D x .655" I.D	AFR #8514
7° Bead Lock Valve Keepers	AFR #9007
Viton Valve Seals .600" O.D x .495" I.D	AFR #6615
Hardened Valve Spring O.D Locator 1.380" O.D x .570" I.D	AFR #8042
Rocker Rail Stand	AFR #6040

238cc LS3 As Cast Flow Chart
	.200	.300	.400	.500	.550	.600	.650
Int	157	229	276	307	315	308	308
Exh	112	152	182	204	209	215	217

Test conducted at 28" of water (pressure) on Superflow 1020
Bore Size: 4.060", intake 3/4" radius plate exhaust, 1 3/4" curved pipe