AFR Cylinder Head 1351 SBF 185 Enforcer, 64cc, Stud Mount

AFR's 1351 185cc SBF Enforcer Cylinder heads feature AFR's Permanent Mold “As-Cast” Technology surfaces on the intake runners, exhaust runners and combustion chambers that allows 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. This cylinder head comes fully assembled with the identical components found in their higher end CNC ported cylinder heads; 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) and one piece 8mm 21 4N Stainless Steel valves.

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
8mm Bead Lock Exhaust Valve, 1.600" x 5.030" Overall Valve Length
PAC Racing Spring 1.290" OD Hydraulic Roller Dual Valve Spring, 140 lbs on seat, .600" maximum lift, Max RPM 6300-6500 (upgrades available)
7° Manley Steel Retainers 1.245" O.D x .885" I.D x .655" I.D
7° Bead Lock Valve Keepers
ARP 3/8" Rocker Studs
Adjustable 5/16" Guide Plates
Viton Valve Seals .675" O.D x .513" I.D
Hardened Valve Spring O.D Locator 1.380" O.D x .570" I.D