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AFR's 210cc "Race Ready" and "Competition" heads feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout. Recommended for race applications and aggressive street/ strip builds up to 400 cubic inches, operating up to 6500- 6800 RPM.

210cc Aluminum SBC Cylinder Heads
Part # Exhaust Port Porting Finish Combustion Chamber
1050 Stock Race Ready 75cc
1054 Stock Race Ready 65cc
1100 Stock Competition 75cc
1103 Stock Competition 65cc
1059 Spread Port Race Ready 65cc
1055 Spread Port Race Ready 75cc
1106 Spread Port Competition 65cc
1105 Spread Port Competition 75cc

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210cc Street Head Flow Chart
  .200 .300 .400 .500 .550 .600 .650
Int 145 199 255 292 301 309 311
Exh 110 158 192 210 214 220 222
210cc Competition Head Flow Chart
  .200 .300 .400 .500 .550 .600 .650
Int 147 201 257 296 310 318 322
Exh 120 166 214 225 229 235 237

Test conducted at 28" of water (pressure) on Superflow 600
Bore Size: 4.060", 3/4" radius plate exhaust, 1 3/4" curved pipe

Included Components
100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
Competition 5-angle Valve Job
8mm Bead Lock Intake Valve, 2.080" x 5.000" Overall Valve Length
8mm Bead Lock Exhaust Valve, 1.600" x 5.030" Overall Valve Length
PAC Racing Spring 1.550" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710" maximum lift, Max RPM 7200-7400
Manley 10° Steel Retainers 1.500" O.D x 1.120" I.D x .705" I.D
10° Bead Lock Valve Keepers
ARP 7/16" Rocker Studs
Adjustable 5/16" Guide Plates
Viton Valve Seals .600" O.D x .495" I.D
Hardened Valve Spring I.D Locator 1.550" O.D x .780" I.D
Ductile Iron Intake Valve Seats 2.200" O.D x 1.750" I.D x .375" Deep
Ductile Iron Exhaust Valve Seats 1.696" O.D x 1.325" I.D x .305" Deep
8 mm Bronze Valve Guides .502" O.D x 2.100" O.A.L
Specifications & Features:
Material
A356 Aluminum
Intake Port Volume
210cc
Intake Port Dimension
2.200" H x 1.310" W x 3/8 Radius
Intake Port Location
Stock
Exhaust Port Volume
80cc
Exhaust Port Dimension
1.420" H x 1.545" W
Exhaust Port Location
.250" Raised
Combustion Chamber Size
65cc or 75cc
Valve Cover Bolt Pattern
Perimeter Bolt
Valve Angle
23°
Valve Spring Pocket Diameter
1.580" O.D
Max Valve Spring Pocket Machining
1.750" O.D
Warning: Do not machine spring pad any deeper.
Deck Thickness
.750"
Minimum Bore Diameter
4.000"
Flat Mill
.006" per cc 60cc Maximum
Angle Mill
.009" per cc 55cc Maximum
Note: Angle mills might require .120" Thick intake gasket.
Minimum Cross Sectional Area
Race Ready: 2.100 sp in, Comp 2.115 sq. in
Spark Plug Dimensions
14mm x .750" w/Gasket Seat
Carb EO#
Not Emissions Complient

Installation Instructions

Footnotes

  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 - Your factory accessory bolts and center bolt valve covers need to be shortened 3/16" or they will bottom out.
    • Modeled after GM L-98 Aluminum Head
  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.
    • 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 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.
    • 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)
    • Runner Volume - Intake runner volumes can vary 2-3cc from advertised specs. The reason for this is that different combustion chamber volumes require different intake runner lengths for proper alignment with the intake manifold.
    • Rocker Arms - Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.