The Most Powerful Standard Street/Strip Head Ever! - Information below is referring to fully assembled heads.
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 |
| 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 |
