AFR 220cc Competition Eliminator SBC Cylinder Heads, Spread Port, 65cc Chambers

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").






AFR's Coolest Racing Head!

AFR's Spread Port is reviving its popular 220cc version due to overwhelming
requests from customers for a larger bolt on standard valve location
head. Unlike the previous 220 cc, the new Eliminator version
requires no special parts. Valves and studs are in stock GM L98
locations just like the very popular, 180, 195, and 210 series
heads. They do not require offset rockers of any kind yet are still
able to muster flow numbers that are in raised runner head
territory. A 329 CFM head that is perfect for someone wanting to
retain all their standard components while still having the airflow
to reach that elusive 700 HP mark in aggressive drag race trim.
Displacement ranging from a high RPM 350 to a 427 CID with natural
applications in the various sportsman classes, bracket/drag cars,
oval track, and larger displacement street machines with typical
operating ranges between 4000 to 8000 RPM depending on application.
As always they come with AFR's trademark 3/4" thick head deck (ideal
for nitrous or blower applications). Standard valves are lightweight
8mm 2.100 intake and 1.600 exhaust with AFR's hardened ductile iron
interlocking seats. Drilling for centerbolt valve covers available as an option.This
head is not for every large displacement combination so if you are
unsure whether this is the right AFR head for you, we always
encourage you to contact us directly before purchasing.

The exhaust ports are raised .250" over a standard GM L-98 cylinder
head.



Note:

2.100 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, 2.100" x 5.000" Overall Valve Length	AFR #7256
8mm Bead Lock Exhaust Valve, 1.600" x 5.030" Overall Valve Length	AFR #7254
PAC Racing Spring 1.550" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710" maximum lift, Max RPM 7200-7400	AFR #8000
Manley 10? Steel Retainers 1.500" O.D x 1.120" I.D x .705" I.D	AFR #8511
10? Bead Lock Valve Keepers	AFR #9009
ARP 7/16" Rocker Studs	AFR #6405
Adjustable 5/16" Guide Plates	AFR #6103
Viton Valve Seals	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" size="4">Specifications, Features, and Optional Supporting Components

Head style="float:right;"> Material	A356 Aluminum
Intake Port Volume	220cc
Intake Port Dimension	style="float:right;">2.240" H x 1.310" W 3/8 Radius
Intake Port Location	Stock
Exhaust Port Volume	style="float:right;">80cc
Exhaust Port Dimension	1.420" H x 1.545" W
Exhaust Port Location	style="float:right;">.250" Raised
Combustion Chamber Size	65cc or 75cc
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	1.750" 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;">2.180 sq. in.
Note:Angle mills might require a .120" Thick intake gasket.
Spark Plug Dimensions	style="float:right;">14mm x .750" w/Gasket Seat
Intake Gasket, Fel-Pro #1206	AFR #6820
Exhaust Port Gasket, Fel-Pro #1409	Fel-Pro #1409
Head Gasket, 350cid Fel-Pro #1003	Street Pkg #6800
Head Gasket, 400cid Fel-Pro #1014	style="float:right;">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
Stud Girdle GM L98	AFR #6200
Suggested Manifold	AFR Titan TXR #4801
Suggested Manifold	style="float:right;">AFR Titan TXS #4802
Spark Plug Starting Range	Autolite 3922
Carb EO#	style="float:right;">Not Emissions Complient

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. Angel mills
might require .120" thick intake gasket.