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200CC SBC ENFORCER CYLINDER HEAD

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$465.00 - $752.00

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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
CARB Status: THESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.
 
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)


 


Item# Description
1011

200cc SBC Enforcer Cylinder Head



$752.00

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    1012

    200cc SBC Enforcer Cylinder Head



    $465.00

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    1016

    200cc SBC Enforcer Cylinder Head



    $752.00

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    		•
    1017

    200cc SBC Enforcer Cylinder Head



    $465.00

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    1. AFR Small Block Chevy

      • We strongly recommend using 7/16" rocker studs with todays fast cam rates and RPM capabilities as 3/8" Rocker Studs can occasionally break.
      • Heads with 1.625" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.
      • Heads are designed for 5/16" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120" thick-wall pushrods.
      • AFR 227/235cc Heads: Due to the "60/40" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race/endurance applications and/or street engines that see a lot of miles.
      • AFR LT-1 / LT-4 / Vortec Heads/ Late Model TBI/TPI Heads - Your factory accessory bolts and center bolt valve covers need to be shortened 3/16" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.

    2. General Recommendations for AFR Cylinder Heads:

      • Bar Codes - Please keep the bar code & paperwork shipped with your head, these contain all the specs for your heads when calling AFR.
      • High Volume/Pressure Oil Pumps - If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end/valve train components.
      • Pushrods - Different length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120" thick-wall pushrods.
      • Mills - Flat or angle mills could affect flow numbers and might require a thicker intake gasket.
      • Stud Girdles - Due to many available factory OEM and aftermarket style/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)
      • Boosted/Nitrous Applications - We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.
      • All MARINE Applications - We strongly recommend Inconel exhaust valves & also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.
      • Valve Guide Clearance - Your AFR Heads come with proper guide clearance (.0012"-.0016") for most applications. Boosted/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.
      • Valve Springs - Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.
      • AFR Titanium Valves - Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.
      • Piston to Valve - AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080" on the intake valve and .100" on the exhaust with a radial clearance of .020" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed. It is the customers responsibility to verify proper piston to valve clearance.
      • CNC Porting - Occasionally a 100% CNC ported head might have a very small area left "as cast", this in no way affects performance.
      • Shaft Mount Rockers - Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.
      • Comp Cams Pro Magnum Rockers - Typically these rocker arms do not clear a 1.500" O.D retainer. A lash cap is required to space up the rocker arm.
      • Spring Installation - To ease installation with 1.550" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)
      • Valve Spring Installed Heights - AFR valve spring installed height spec is +/- .015 which is the smallest shim available for adjustment.
      • Rocker Arms - Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.

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