Afr 185cc Renegade Sbf Cylinder Heads, 58cc Chambers, Emissions-Legal

AFR`s 185cc "Street" heads feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout. Recommended for engines from 302-393 cubic inches, operating up to 6000-6500 RPM. Legal for 1995 and older emissions controlled vehicles under CARB EO #D-250-3 (Part numbers 14xx). Not compatible with OEM pistons. Component upgrade and machining options are available to customize AFR Heads to your specific build.
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  58cc 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.