AFR Chevy 238cc Enforcer As-Cast LS3 Cylinder Head, 72cc Chambers, Assembled
Head come fully assembled with the identical components found in our higher end CNC ported cylinder head; such as PAC Racing springs, viton valve seals, machined bead valve locks (not stamped), hardened spring seats, ductile iron seats (not powdered metal) 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 pieces required per engine.
Description
AFR's 238cc LS3 Enforcer Cylinder head feature a 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.
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
Basic Package Components | Part # |
As-Cast Combustion Chambers As-Cast Exhaust Ports As-Cast Intake Ports 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 1.270" OD Hydraulic Roller Dual Valve Spring, 155 lbs. on seat, .650 maximum lift, Max RPM 7000-7200 | 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 |
Head Material |
A356 Aluminum |
Intake Port Volume | 238cc |
Intake Port Dimension |
2.540"H x 1.190"W x 7/16° Radius |
Intake Port Location
|
Stock |
Exhaust Port Volume | 92cc |
Exhaust Port Dimension |
1.500" H x 1.740" W |
Exhaust Port Location |
Stock |
Combustion Chamber Size |
72cc |
Valve Cover Bolt Pattern
|
Center Bolt |
Valve Angle |
12° |
Valve Spring Pocket Diameter |
1.490" O.D |
Max Valve Spring Pocket Machining |
1.510" O.D |
Warning: Do not machine spring pad any deeper. | |
Deck Thickness
|
.750" |
Minimum Bore Diameter |
4.000" |
Flat Mill - 65cc chamber
|
.006" per cc 62cc Maximum |
Spark Plug Dimensions
|
14mm x .750" w/ Tapered or Gasket Seat |
Intake Port Gasket |
Factory GM or Aftermarket |
Recommend Rockers - OEM w/ trunion upgrade Yella Terra 6733 w/ 5132 Valve Cover gasket. |
Scorpion 1162 |
Exhaust Port Gasket |
GM #12558573 |
Head Gasket | Cometic 4.160 Bore Size |
Head Bolts (04+), ARP 134-3610 |
AFR #6334 |
Head Studs (04+), 2004 & Later Blocks ARP #234-4317, Pre 2004 Blocks ARP #234-4316 |
AFR #6335 |
Head Bolt Washers, Manley |
AFR #6320 |
Suggested Manifold |
FAST 92mm or 102mm |
Spark Plug Starting Range |
NGK TR55 |
Pushrods: Longer than Stock (see instructions for details) |
Details
- AFR 1803
- AFR 1803
- Air Flow Research
- Available
- New
Categories
Shipping Information
- Item Requires Shipping
- 35.0 lbs.
- W12.0000” x H12.0000” x L24.0000”
- Free Basic Shipping
- This item ships in its own box.
- FREE continental USA ground shipping on ALL AFR Cylinder Heads
- TRE Performance Difference
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