245cc SBC "Eliminator" 23° NPP™ Racing Head

Performance Like a Raised Runner Head

AFR is proud to introduce our 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 our 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 our 227 or 235 SBC product and in fact shares indentical valve centerlines and rocker stud locations to both of those heads. However, unlike the 227 and 235 heads, this product will not accept stud mount style rockers and a shaft mount rocker system with a .180 offset intake lifter is required. Larger diameter 3/8" pushrods fit without additional clearancing. This is primarily due to the fact we enlarged and widened the pushrod pinch removing that checkpoint in the entrance of the intake allowing us 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. The exhaust port and bolt pattern are raised .250 over GM L98 head, this rarely affects header or chassis fitment. If you are unsure if this is the right AFR head for you, we encourage you to contact us directly to discuss your combination. (see footnotes here) for additional information.

245cc SBC Aluminum Cylinder Head Flow Chart

245cc SBC Cylinder Head Flow Chart

Basic Package Components
100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
Competition 5-angle Valve Job
AFR #7253 Bead Lock Intake Valve, 2.125" x 5.006" Overall Valve Length
AFR #7254 Bead Lock Exhaust Valve, 1.600" x 5.024" Overall Valve Length
AFR #8001 PAC Racing Springs 1.550" OD Solid Roller Dual Valve Spring Pac #1225, 250 lbs on seat, .800" maximum lift, Max RPM 8000-8200
AFR #8511 Manley 10° 4140 Chrome Moly Retainers
AFR #9009 10° Bead Lock Valve Keepers
AFR #6612 Viton Valve Seals
AFR #8045 Hardened Spring Seat
AFR #9060 Intake Valve Seats
AFR #9070 Exhaust Valve Seats
AFR #9051 Bronze Valve Guides



Specifications, Features, and Optional Supporting Components
65-70 ft. lbs Head Torque w/ Moly Lube
AFR #6820 Intake 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 #6835 Exhaust Port Gasket, Fel-Pro #1405
AFR #6801 Head Gasket, 350cid Fel-Pro #1004
AFR #6802 Head Gasket, 400cid Fel-Pro #1014
AFR #6310 SB Chevy Head Bolt Kit, ARP #134-3701
AFR #6305 SB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301
AFR #6320 Head Bolt Washers, Manley
AFR Titan TXR #4801 Suggested Manifold
Autolite 3910 Spark Plug Starting Range
70cc or 80cc Combustion Chambers
Can be cut to 1.680, no deeper Spring Pocket
60/40 Valve Spacing
T&D .450 offset w/ .180 offset lifter or T&D .550 offset w/ standard lifters Rocker Arms
23° Valve Angle
.008" per cc Angle Mill (Milling options available)
.006" per cc Flat Mill (Milling options available)

Note: Flat & angle mills might require .120 thick intake gasket. Not legal for sale or use on pollution controlled vehicles in the US.

 Model      Product Name   Price   Buy Now 
 1137   AFR SBC 245cc Competition Package, Standard Exhaust, 70cc chambers, complete w/ parts   AFR SBC 245cc Competition Package, Standard Exhaust, 70cc chambers, complete w/ parts   $2,524.00  Buy Now 
 1138   AFR SBC 245cc Competition Package, standard exhaust, 80cc chambers, complete w/ parts   AFR SBC 245cc Competition Package, standard exhaust, 80cc chambers, complete w/ parts   $2,524.00  Buy Now 
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Air Flow Research | 28611 W. Industry Drive | Valencia, CA 91355 | 661-257-8124

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