AFR 245cc SBC Chevy Aluminum Competition Package Eliminator Cylinder Heads 245 cc 1137 1138 - Air Flow Research - TREperformance.com
AFR 245cc SBC Cylinder Heads
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AFR is proud to introduce the new 245 NPP (no pushrod pinch); best suited for max effort applications, but larger displacement 427+ pump gas engines could consider this head as well. This exciting product represents the best flowing 23° SBC head to date and while flow numbers may reflect a very good 18° head of the past, this head is still a conventional direct bolt on non-raised runner intake port configuration. It will drop on your 23° shortblock as easily as the 227cc or 235cc AFR SBC product and in fact shares indentical valve centerlines and rocker stud locations to both of those heads. However, unlike the 227 and 235 cc heads, this product will not accept stud mount style rockers and a shaft mount rocker system with the proper intake offset must be used. This is primarily due to the enlarged and widened pushrod pinch removing that checkpoint in the entrance of the intake allowing AFR to design a port with a more direct shot at the back of the valve that also has a more consistent cross sectional area and velocity profile. In addition, this head comes standard with a 3/4 inch deck, 2.125 intake and 1.600 exhaust. If you are unsure if this is the right AFR head for you, we encourage you to contact us directly to discuss your combination. Dual valve cover bolt pattern is standard.
The exhaust ports are raised .250" over a standard GM L-98 cylinder head.
ALL AFR 245cc Competition series available, part numbers 1137 1138
2.125 valves will require aftermarket pistons notched for valve clearance.
|Basic Package Components||Part #|
CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
Competition 3-angle Radiused Valve Job
|Bead Lock Intake
Valve, 2.125" x 100L
|Bead Lock Exhaust Valve, 1.600" x 100L||AFR #7254|
|1.550" OD Dual
Solid Roller Valve Spring w/ dampener,
|250 lbs on seat,
.800" maximum lift
|10° 4140 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|
Gasket 350 cid
||Fel-Pro #1004, AFR #6801|
|Head Gasket 400 cid
||Fel-Pro #1014, AFR #6802|
Chevy Head Bolt Kit
|SB Chevy Head Stud Kit, 12 Point Nuts||ARP #234-4301 AFR #6305|
Bolt Washers, Manley
|Spark Plug Starting Range||Autolite 3910|
|Combustion Chambers||70cc or 80cc|
be cut 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|
Do not port match you intake manifold to any
Fel-Pro gasket as it does not precisely match AFR
Note: Milling head deck will affect flow numbers.
Angle mills might require .120 thick instake
- 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