AFR's 185cc SBF Enforcer Cylinder head features their Permanent Mold “As-Cast” Technology surfaces on the intake runners, exhaust runners and combustion chambers that allow for extremely accurate and repeatable port location/performance. This budget-friendly head is perfect for your 302 to 363 Cubic Inch operating below 6000 RPM.
The all-new SBF 185cc Enforcer cylinder head features 2.020" intake valves, 1.600" exhaust valves and will come assembled with their 8017 springs; which are compatible with hydraulic roller or "Street" solid flat tappet camshafts. The head requires a 3/8" stud mounted rocker and is good for up to 0.600" of lift and approximately 6,500 RPM when used with a hydraulic roller camshaft. They come fully assembled with the identical components found in their higher-end CNC ported cylinder head; such as ARP rockers studs, PAC Racing Springs, Viton valve seals, AFR adjustable guide plates, machined bead valve locks (not stamped), hardened spring cups and ductile iron seats (not powdered metal) their one-piece 8mm 21 4N Stainless Steel valves. They are available bare without any parts for the DIY.
Sold as a single piece, 2 pieces required per engine.
| 185cc Street Head Flow Chart | ||||||
| .200 | .300 | .400 | .500 | .550 | .600 | |
| Int | 119 | 177 | 225 | 255 | 257 | 260 |
| Exh | 105 | 143 | 163 | 166 | 168 | 170 |
Test conducted at 28" of water (pressure) on Superflow 600
Bore Size: 4.060", 3/4" radius plate exhaust, 1 3/4" curved pipe
| Basic Package Components | Part # |
| As Cast Combustion Chambers As Cast Exhaust Ports As Cast Intake Ports 3-angle Valve Job |
|
| 8mm Bead Lock Intake Valve, 2.020" x 5.000" Overall Valve Length | AFR #7257 |
| 8mm Bead Lock Exhaust Valve, 1.600" x 5.030" Overall Valve Length | AFR #7254 |
| 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° Manley Steel Retainers 1.245" O.D x .885" I.D x .655" I.D | 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 .675" O.D x .513" I.D | AFR #6614 |
| Hardened Valve Spring O.D Locator 1.380" O.D x .570" I.D | AFR #8042 |
| Specifications, Features, and Optional Supporting Components |
| Head Material |
A356 Aluminum |
| Intake Port Volume | 185cc |
| Intake Port Dimension |
2.010" H x 1.070" W x 5/16 Radius |
|
Intake Port Location
|
Stock |
| Exhaust Port Volume | 64cc |
| Exhaust Port Dimension |
1.370" H x 1.350" W |
| Exhaust Port Location |
Stock |
| Combustion Chamber Size | 64cc |
| Valve Angle | 20° |
| Valve Spring Pocket Diameter | 1.540" O.D |
| Max Valve Spring Pocket Machining |
1.600" O.D |
|
Deck Thickness
|
.325" |
| Minimum Bore Diameter | 4.000" |
| Spark Plug Dimensions |
14mm x .750" w/Gasket Seat |
| Intake Port Gasket |
AFR #6911 |
| Important: Do not port match your intake manifold to Fel-Pro gasket as it does not precisely fit the AFR head. | |
| Exhaust Port Gasket |
AFR #6915 |
| Head Gasket, 302/351W, 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 |
| Flat Mill |
.006" per cc 54cc Max (from 64cc) |
| Suggested Manifold |
AFR #4830 |
| Spark Plug Starting Range | Autolite 3924 |
