AFR Cylinder Head SB Ford 205 Enforcer CNC Ported, Stage 1, 65cc, Stud Mount

CNC-Motorsports has taken AFR's 1351 185cc SBF Enforcer Cylinder heads to the next level of performance offerings. This 205cc CNC ported cylinder head offers impressive flow numbers while maintaining the stock valve size for excellent street characteristics and drivability. This cylinder head comes fully assembled with 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.

CNC Ported Exhaust Ports
CNC Ported Intake Ports
CNC Ported Combustion Chambers
Stock AFR 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
Note: There are some parts of the head that will not see porting marks as this is not a porters casting head

Flow numbers with 2.020 intake valve and 1.600 exhaust valve (No pipe on the exhaust)

.050 lift: 23cfm Exhaust - 32cfm Intake

.100 lift: 48cfm Exhaust - 69cfm Intake

.200 lift: 107cfm Exhaust - 143cfm Intake

.300 lift: 143cfm Exhaust - 203cfm Intake

.400 lift: 163cfm Exhaust - 235cfm Intake

.500 lift: 171cfm Exhaust - 260cfm Intake

.600 lift: 180cfm Exhaust - 278cfm Intake

.700 lift: 187cfm Exhaust - 296cfm Intake

.800 lift: 189cfm Exhaust - 303cfm Intake

*Changing to 2.050 intake valve and doing a performance valve job will greatly increase the flow even more.