AFR 205cc Competition Renegade SBF Cylinder Heads, 58cc Chambers

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.