Afr 205cc Competition Renegade Sbf Cylinder Heads, 58cc Chambers

AFR`s 205cc "Competition" heads feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout. Recommended for race applications and very aggressive street/strip builds. Component upgrade and machining options are available to customize AFR Heds to your specific build.
The Most Powerful Standard Street/Strip Head Ever!
If you’re looking for the world's finest street/strip head available, AFR's 205cc aluminum cylinder head is your answer. With lightweight 8mm 2.080" intake valves and 1.600" exhaust valves this head moves tremendous volumes of air through conservative runner volumes, spelling big torque and horsepower numbers. With combustion chamber volumes of 58cc or 72cc accompanied by 70cc exhaust ports which are raised .125 higher than stock, AFR's new 205cc is the ultimate choice for 331 through 392 engines operating from 3500 RPM to 8000 RPM. AFR's trademark 3/4" thick head deck makes them ideal for heavy nitrous or blower applications. With available optional nitrous or blower exhaust ports featuring 73cc ultra high flowing exhaust ports.

Notes:
2.080 valves will require aftermarket pistons notched for valve clearance.
All 205cc head exhaust ports are raised .125 over stock.

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, 2.080" x 5.000" Overall Valve Length AFR #7255 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 (upgrades available) AFR #8000 10° Manley Steel Retainers 1.500" O.D x 1.120" I.D x .705" I.D AFR #8511 10° Bead Lock Valve Keepers with lashcap recess 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 2.131" 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
Specifications, Features, and Optional Supporting Components Head Material A356 Aluminum Intake Port Volume 205cc Intake Port Dimension 2.130" H x 1.300" W 3/8 Radius Intake Port Location Stock Exhaust Port Volume 70cc Exhaust Port Dimension 1.400" H x 1.400" W Exhaust Port Location Raised .125" Combustion Chamber Size 58cc or 72cc Valve Cover Bolt Pattern Perimeter Bolt Valve Angle 20° Valve Spring Pocket Diameter 1.580" 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 2.165 sq. in. Note: Do not port match your intake manifold to Fel-Pro gasket as it does not precisely fit AFR. Spark Plug Dimensions 14mm x .750" w/Gasket Seat Carb EO# N/A
Head Bolt Diameter 1/2" Intake Port Gasket, Fel-Pro #1262 AFR #6832
Exhaust Port Gasket, Fel-Pro #1487 AFR #6839 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 RPM Performer or Vic Jr.  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.