AFR 245cc Competition Eliminator SBC Cylinder Heads, Spread Port, 80cc Chambers, Titanium Retainers

Spread port heads have the center exhaust ports spread apart approximately 1/2" over stock GM heads. The reason for spread port heads is to achieve additional cooling in the center of the head where the heat concentration is greatest. As standard headers do not fit, spread port headers are required since the center ports are spread further apart than stock GM products. The increased spacing on the exhaust port also requires the use of exhaust gasket Fel-Pro #1409. Spread port heads only come with a Stahl bolt pattern. AFR's spread port head has all the benefits and features of AFR's standard head. As all benefits and features are the same, please review respective page for product details (i.e. for 210cc spread port view 210cc SBC "Eliminator").
The Best 23? Spread Port 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.

color="#ffffff" size="4">Basic Package Components	color="#ffffff" size="4">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
style="float:right; margin-right: 10px;"> 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

color="#ffffff">Specifications, Features, and Optional Supporting Components
Head style="float:right;"> Material	A356 Aluminum
Intake Port Volume	245cc
Intake Port Dimension	style="float:right;">2.200" H x 1.300" W 7/16 Radius
Intake Port Location	Stock
Exhaust Port Volume	style="float:right;">80cc
Exhaust Port Dimension	1.465" H x 1.570" W
Exhaust Port Location	style="float:right;">.250" Raised
Combustion Chamber Size	70cc or 80cc
Valve Cover Bolt Pattern	style="float:right;">Perimeter Bolt
Valve Angle	23?
Valve Spring Pocket Diameter	style="float:right;">1.580" O.D
Max Valve Spring Pocket Machining	1.680" O.D
Deck Thickness	style="float:right;">.750"
Minimum Bore Diameter	4.000"
Flat Mill	style="float:right;">.006" per cc 60cc Maximum
Angle Mill	.009" per cc 55cc Maximum
Minimum Cross Sectional Area	style="float:right;">2.730 sq. in.
Note:Angle mills might require a .120" Thick intake gasket.
Spark Plug Dimensions	style="float:right;">14mm x .750" w/Gasket Seat
Carb EO#	Non Emissions Compliant
Shaft Mount Rocker Arms,	style="float:right;">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 #1409	Fel-Pro #1409
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.