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AFR's 200cc SB Chevy 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 350 to 400 cubic inch operating below 6000 RPM.
They come fully assembled with the identical components found in our higher-end CNC ported cylinder heads; such as ARP rockers studs, racing springs, Viton valve seals, AFR adjustable guide plates, machined bead valve locks (not stamped), hardened spring cups and our one piece 8mm 21 4N stainless steel valves.
They are available in straight or angle plug and bare without any parts for the DIY racer. Sold as a single piece; 2 are required per engine. Please see footnotes for additional information.
| Included Components | |
| As Cast Combustion Chambers | |
| As Cast Exhaust Ports | |
| As Cast Intake Ports | |
| Multi-Angle Valve Job | |
| SBC/SBF 8mm Stainless Steel 2.050 x 4.900 O.A.L. Race Intake Valve | |
| SBC/SBF 8mm Stainless Steel 1.600 X 4.950 O.A.L. Race Exhaust Valve | |
| Melling Racing Spring 1.290" OD Hydraulic Roller Dual Valve Spring, 140 lbs on seat, .600" maximum lift, Max RPM 6300-6500 (upgrades available) | |
| 7° Chrome Moly Retainers 1.245" O.D x .885" I.D x .655" I.D | |
| 7° Bead Lock Valve Keepers | |
| ARP 3/8" Rocker Studs | |
| Adjustable 5/16" Guide Plates | |
| 8mm LS Enforcer Viton Valve Seals .620" O.D x .490" I.D | |
| Hardened Valve Spring O.D Locator 1.380" O.D x .570" I.D | |
| 200cc As Cast Flow Chart | ||||||
| .200 | .300 | .400 | .500 | .550 | .600 | |
| Int | 138 | 194 | 233 | 260 | 265 | N/A |
| Exh | 108 | 142 | 170 | 195 | 200 | N/A |
Test conducted at 28" of water (pressure) on Superflow 600
Bore Size: 4.060", 3/4" radius plate exhaust, 1 3/4" curved pipe
| Specifications & Features: | |
| Material |
A356 Aluminum or international equivalent |
| Intake Port Volume |
198 - 200c |
| Intake Port Dimension |
2.080" H x 1.270" x 5/16 Radius |
| Intake Port Location |
Stock |
| Exhaust Port Volume |
74cc |
| Exhaust Port Dimension |
1.450" H x 1.550" W |
| Exhaust Port Location |
Stock |
| Combustion Chamber Size |
69cc |
| Valve Cover Bolt Pattern |
Perimeter Bolt |
| Valve Angle |
23° |
| Valve Spring Pocket Diameter |
1.500" O.D |
| Max Valve Spring Pocket Machining |
1.580" O.D |
| Warning: Do not machine spring pad any deeper. | |
| Deck Thickness |
.470" |
| Minimum Bore Diameter |
4.000" |
| Minimum Head Gasket Bore | 4.100" |
| Flat Mill |
.006" per cc 56cc Maximum |
| Spark Plug Dimensions |
14mm x .750" w/Gasket Seat |
| Recommended Components: | |
| Intake Gasket | |
| Important: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes. | |
| Exhaust Port Gasket | |
| Head Gasket, 350cid Fel-Pro #1003 | |
| Head Gasket, 400cid Fel-Pro #1014 | |
| SB Chevy Head Bolt Kit, ARP #134-3701 | |
| SB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301 | |
| Head Bolt Washers, Manley | |
| Suggested Manifold | |
| Suggested Manifold | |
| Spark Plug Starting Range |
AFR #6218 (Autolite 3924) |
| Categories | Engine Components |
|---|---|
| Manufacturer Part Number | 1016 |
| Brand | Air Flow Research |
| Part Type | Cylinder Heads |
| Vehicle Make | Chevrolet, Ford |
| Engine Type | LS Series, Small Block |
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