AFR 185cc Renegade SBF Cylinder Heads, 72cc Chambers, Non-Emissions

The Ultimate Bolt-On Emission Legal Street/Strip Weapon!
If you need the world´s finest street/strip small block Ford head, check out AFR´s all new 185cc intake port emissions legal (CARB EO #250-3) performance aluminum cylinder heads. With lightweight 8mm 2.020" intake valves, 1.600" exhaust valves, combustion chamber volumes of 58cc or 72cc, and 70cc exhaust ports, AFR´s new 185cc Ford cylinder heads are designed for 302-351 cid engines operating from 1500 rpm to 6500 rpm. A 3/4" thick head deck makes the AFR head ideal for nitrous or blower applications. Also available with optional nitrous or blower exhaust ports featuring 70cc ultra high flowing exhaust ports. These heads will not accept shaft mount rocker arms. Hardened pushrods required with cylinder heads #1420 and #1422. High flow 2.020 valves might require aftermarket pistons notched for valve clearance.

Note:
Hydraulic roller cams typically experience valve float at 6000-6200 rpm because of their fast ramp rates. AFR suggests you upgrade your springs to AFR part #8019, 1.270 O.D. with higher spring pressures to reduce chances of valve float associated with rpm’s 6200 or higher, but smaller cams with less than .500 lift can rev to 6500 rpm with the included springs.
Note: Stock 86-93 5.0L must have pistons notched for 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 2.020" x 4.900" O.A.L.	AFR #7251
Bead Lock Exhaust Valve, 1.600"	AFR #7250
Pedastal 8mm Bead Lock Intake Valve 2.020" x 5.080" O.A.L	AFR #7263
Pedestal 8mm Bead Lock Exhaust Valve, 1.600" x 5.100" O.A.L	AFR #7264
PAC Racing Spring 1.290" OD Hydraulic Roller Dual Valve Spring, 140 lbs on seat, .600" maximum lift, Max RPM 6300-6500 (upgrades available)	AFR #8017
7° Chrome Moly Retainers	AFR #8514
7° Bead Lock Valve Keepers	AFR #9007
ARP 3/8" Rocker Studs	AFR #6409
Adjustable 5/16" Guide Plates	AFR #6103
Viton Valve Seals	AFR #6612
Hardened Spring Cup	AFR #8042
Ductile Iron Intake Valve Seats 2.131" O.D x 1.680" I.D x .375" Deep	AFR #9059
Ductile Iron Exhaust Valve Seats 1.650" O.D x 1.350" I.D x .375" Deep	AFR #9069
Bronze Valve Guides	AFR #9051
Thermactor Air Injector	AFR #6226

Specifications, Features, and Optional Supporting Components

Head Material	A356 Aluminum
Intake Port Volume	185cc
Intake Port Dimension	2.045" H x 1.205" W x 3/8 Radius
Intake Port Location	Stock
Exhaust Port Volume	70cc
Exhaust Port Dimension	1.355" H x 1.360" W
Exhaust Port Location	Stock
Combustion Chamber Size	72cc
Valve Cover Bolt Pattern	Perimeter Bolt
Valve Angle	20°
Valve Spring Pocket Diameter	1.460" O.D
Max Valve Spring Pocket Machining	1.625" O.D
Deck Thickness	.750"
Minimum Bore Diameter	4.000"
Flat Mill	.006" per cc 54cc Max (from 58cc); 68cc Max (from 72cc);
Angle Mill	.009" per cc 48cc Max (from 58cc); 62cc Max (from 72cc)
Minimum Cross Sectional Area	2.025 sq. in.
Note:Angle mills might require a .120" Thick intake gasket.
Spark Plug Dimensions	14mm x .750" w/Gasket Seat
Carb EO#	D-250-3
Head Bolt Diameter	1/2"
Intake Port Gasket, Fel-Pro #1262	AFR #6832
Exhaust Port Gasket, Fel-Pro #1415	AFR #6837
Head Gasket, 302/351 Windsor, Fel-Pro #1011-1	AFR #6808
SB Ford 1/2" Bolt Head Bolts, ARP #154-3603	AFR #6318
SB Ford 1/2" Bolt Head Studs, ARP #254-4503	AFR #6317
1/2" Bolt - 7/16" Thread Head Bolts, 289/302W: ARP 254-3708	AFR #6319
Head Bolt Washers, Manley	AFR #6320
Stud Girdle	AFR #6207
Suggested Manifold	Performer or Performer RPM
Spark Plug Starting Range	Autolite 3924

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.