235cc SBC "Eliminator" 23° Racing Head
Our Largest and Most Powerful 60/40 Head
AFR's 235cc "Competition" heads feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout. This head features 60/40 valve spacing and requires shaft mount rocker arms for optimum valve train geometry (can be used with .050 offset intake rockers for drag race only applications).
235cc SBC Aluminum Cylinder Head Flow Chart
Tested on 4.125 Bore
Included Components
100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
Competition 5-angle Valve Job
AFR #72538mm Bead Lock Intake Valve, 2.125" x 5.00" long
AFR #72548mm Bead Lock Exhaust Valve, 1.600" x 5.030" long
AFR #8000PAC Racing Spring 1.550" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710" maximum lift, Max RPM 7200-7400
AFR #850510° Titanium Retainers 1.500" O.D x 1.120" I.D x .705" I.D
AFR #900910° Bead Lock Valve Keepers with lashcap recess
AFR #6405ARP 7/16" Rocker Studs
AFR #6103Adjustable 5/16" Guide Plates
AFR #6612Viton Valve Seals .600" O.D x .495" I.D
AFR #8048Hardened Valve Spring I.D Locator 1.550" O.D x .780" I.D
AFR #9060Ductile Iron Intake Valve Seats 2.200" O.D x 1.750" I.D x.375" Deep
AFR #9070Ductile Iron Exhaust Valve Seats 1.696" O.D x 1.325" I.D x .305" Deep
AFR #90518mm Bronze Valve Guides .502" O.D x 2.100" O.A.L
Specifications & Features:
A356 AluminumMaterial
235ccIntake Port Volume
2.200" H x 1.290" W 5/16 RadiusIntake Port Dimension
StockIntake Port Location
80ccExhaust Port Volume
1.430" H x 1.540" WExhaust Port Dimension
.250" RaisedExhaust Port Location
70cc or 80ccCombustion Chamber Size
Perimeter BoltValve Cover Bolt Pattern
23°Valve Angle
1.580" O.DValve Spring Pocket Diameter
1.680" O.DMax Valve Spring Pocket Machining
Warning: Do not machine spring pad any deeper.
.750"Deck Thickness
4.000"Minimum Bore Diameter
.006" per cc 65cc MaximumFlat Mill
.009" per cc 60cc MaximumAngle Mill
2.470 sq. in. Minimum Cross Sectional Area
14mm x .750" w/Gasket SeatSpark Plug Dimensions
Non Emissions CompliantCarb EO#
Note: Angle mills might require .120" Thick intake gasket.
Recommended Components:
AFR #6055Shaft Mount Rocker Arms, T&D .450" off-set
AFR #6036Stud Mount Rocker Arms, Hardland Sharp .050 offset
AFR #6035Stud Mount Rocker Arms, Hardland Sharp .050 offset
AFR #6820Intake Gasket 1.310 x 2.180 w/ 3/8" radius, Fel-Pro #1206
Important: Do not port match your intake manifold to Fel-Pro gasket as it does not precisely fit AFR heads.
AFR #6835Exhaust Port Gasket, Fel-Pro #1405
AFR #6801Head Gasket, 350cid Fel-Pro #1004
AFR #6802Head Gasket, 400cid Fel-Pro #1014
AFR #6310SB Chevy Head Bolt Kit, ARP #134-3701
AFR #6305SB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301
AFR #6320Head Bolt Washers, Manley
AFR #6208Stud Girdle AFR Offset
AFR Titan TXR #4801Suggested Manifold
AFR Titan TXS #4802Suggested Manifold
Autolite 3922Spark Plug Starting Range