AFR 245cc Competition Eliminator SBC Cylinder Heads, 70cc Chambers, Titanium Retainers

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 identical 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. Drilling for centerbolt valve covers available as an option.
The exhaust ports are raised .250" over a standard GM L-98 cylinder head.

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 5-angle Valve Job
8mm Bead Lock Intake Valve, 2.125" x 5.00" long	AFR #7253
8mm Bead Lock Exhaust Valve, 1.600" x 5.030" Overall Valve Length	AFR #7254
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 #8001
10? Titanium Retainers 1.490" O.D x 1.115" I.D x .745" I.D.	AFR #8505
10? Bead Lock Valve Keepers with lashcap recess	AFR #9009
Viton Valve Seals .600" O.D x .495" I.D	AFR #6612
Hardened Valve Spring I.D Locator 1.550" O.D x .780" I.D	AFR #8048
Ductile Iron Intake Valve Seats 2.200" O.D x 1.750" I.D x .375" Deep	AFR #9060
Ductile Iron Exhaust Valve Seats 1.696" O.D x 1.325" I.D x .305" Deep	AFR #9070
Bronze Valve Guides	AFR #9051

Specifications, Features, and Optional Supporting Components

Head Material	A356 Aluminum
Intake Port Volume	245cc
Intake Port Dimension	2.200" H x 1.300" W 7/16 Radius
Intake Port Location	Stock
Exhaust Port Volume	80cc
Exhaust Port Dimension	1.465" H x 1.570" W
Exhaust Port Location	.250" Raised
Combustion Chamber Size	70cc or 80cc
Valve Cover Bolt Pattern	Perimeter Bolt
Valve Angle	23?
Valve Spring Pocket Diameter	1.580" O.D
Max Valve Spring Pocket Machining	1.680" O.D
Deck Thickness	.750"
Minimum Bore Diameter	4.000"
Flat Mill	.006" per cc 60cc Maximum
Angle Mill	.009" per cc 55cc Maximum
Minimum Cross Sectional Area	2.730 sq. in.
Note:Angle mills might require a .120" Thick intake gasket.
Spark Plug Dimensions	14mm x .750" w/Gasket Seat
Carb EO#	Non Emissions Compliant
Shaft Mount Rocker Arms,	T&D .450" offset (requires .180 offset lifters)
Shaft Mount Rocker Arms	T&D .550" offset (with standard lifters)
Intake Gasket 1.280x2.090 w/ 3/8" radius, Fel-Pro #1206	AFR #6820
Exhaust Port Gasket, Fel-Pro #1405	AFR #6835
Head Gasket, 350cid Fel-Pro #1004	AFR #6801
Head Gasket, 400cid 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	AFR Titan TXR #4801
Suggested Manifold	AFR  Titan TXS #4802
Spark Plug Starting Range	Autolite 3922

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.