The Best 23° AFR Head Ever Produced!
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

Note:
2.125 valves will require aftermarket pistons notched for valve clearance.

Basic Package Components	Part #
100% 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	AFR #7253
Bead Lock Exhaust Valve, 1.600" x 100L	AFR #7254
1.550" OD Dual Solid Roller Valve Spring w/ dampener,	AFR #8001
250 lbs on seat, .800" maximum lift	Pacaloy #1225
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
Hardened Spring Seat	AFR #8045
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
Head Gasket 350 cid	Fel-Pro #1004, AFR #6801
Head Gasket 400 cid	Fel-Pro #1014, AFR #6802
SB Chevy Head Bolt Kit	ARP #134-3701 AFR #6310
SB Chevy Head Stud Kit, 12 Point Nuts	ARP #234-4301 AFR #6305
Head Bolt Washers, Manley	AFR #6320
Suggested Manifold, Super Victor	AFR #5033
Spark Plug Starting Range	Autolite 3910
Combustion Chambers	70cc or 80cc
Spring Pocket	Can be cut to 1.680, no deeper
Valve Spacing	60 / 40
Rocker Arms	Shaft Mount ONLY
Valve Angle	23°
Angle Mill (Milling options available)	.008" per cc
Flat Mill (Milling options available)	.006" per cc

Important: Do not 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. Angle mills might require .120 thick instake gasket.