AFR 235cc SBC Chevy Aluminum Competition Package Eliminator Cylinder Heads 235 cc 1130 1132 1134 - Air Flow Research - TREperformance.com
AFR 235cc SBC Cylinder Heads
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With the price of big displacement SBC engines fractions of what they were years ago, the allure to go BIG is stronger than ever. To help quench the thirst of that large displacement monster AFR is proud to offer the largest direct bolt on 23° Chevy head yet. At 235cc, anything under 400 cubic inches can look the other way. It has the same geometry of the 227 head and will accept all the same rocker arms, stud girdles, shaft mount systems, etc. AFR offset stud girdles are the only special parts required. Some applications require shaft mount rockers or .050 offset intake rocker arm for durability and reliability of valve train components. Standard rocker arms can be used but the intake rocker arm will be at a slight angle and the roller tip will not be perfectly centered on the valve. These brand new heads feature a larger 2.125" diameter intake valve. Exhaust valve diameter stays the same at 1.600" with a little more flow from the larger runner volume. The big news is the all new intake port design which pushes this standard location intake port over 340 CFM’s! That’s 18° territory and this head should be able to generate power figures that rival those other companies 18° heads (725+ HP). This head is not for every large displacement combination so if you are unsure whether this is the right AFR head for you, we always encourage you to contact us directly before purchasing. Not recommended for street use, unless a shaft mount rocker system is used. Dual valve cover bolt pattern is standard.
The exhaust ports are raised .250" over a standard GM L-98 cylinder head.
ALL AFR 235cc Competition series available, part numbers 1130 1132 1134
2.125 valves will require aftermarket pistons notched for valve clearance.
|Basic Package Components||Part #|
Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
Competition 3-angle Radiused Valve Job
|Bead Lock Intake
|Bead Lock Exhaust Valve, 1.600" x 100L||AFR #7254|
|1.550" OD Dual
Spring w/ dampener,
|225 lbs on seat, .710" maximum lift (upgrades available)||Pacaloy #8001|
|10° Chrome Moly Retainers||AFR #8511|
|10° Bead Lock Valve Keepers||AFR #9009|
|7/16" Rocker Studs||AFR #6405|
|Guide Plates||AFR #6105|
|Viton Valve Seals||AFR #6612|
|Intake Vavle Seats||AFR #9060|
|Exhaust Vavle Seats||AFR #9070|
|Bronze Valve Guides||AFR #9051|
|Specifications, Features, and Optional Supporting Components|
|Head Torque||65-70 ft. lbs|
|Rocker Stud Torque||55-60 ft. lbs|
|Intake Port Gasket, 1.310" X 2.180" w/ 3/8" radius||Fel-Pro #1206, AFR #6820|
|Exhaust Port Gasket||Fel-Pro #1405, AFR #6835|
||Fel-Pro #1004, AFR #6801|
|Head Gasket 400 cid
||Fel-Pro #1014, AFR #6802|
Head Bolt Kit
|SB Chevy Head Stud Kit, 12 Point Nuts||ARP #234-4301 AFR #6305|
|Stud Girdle AFR
Offset AFR Only
|Spark Plug Starting Range||Autolite 3910|
|Combustion Chambers||70cc or 80cc|
to 1.680, no deeper
|Valve Spacing||60 / 40
|Angle Mill (Milling options available)||.008" per cc|
|Flat Mill (Milling options available)||.006" per cc|
port match you intake manifold to any Fel-Pro
gasket as it does not
precisely match AFR heads.
Note: Milling head deck will affect flow numbers.
- Item Requires Shipping
- 65.0 lbs.
- W12.0000” x H12.0000” x L24.0000”
- Free Shipping!
- This item ships in its own box.
- FREE continental USA ground shipping on ALL AFR Cylinder Heads