Initially offered in four fitments — small-block Chevy, cathedral-port LS1, big-block Chevy, and small-block Ford — the heads do share some features across the line. All of the Enforcer cylinder heads are manufactured using permanent-mold castings and feature the as-cast surface finish on the intake and exhaust runner walls and combustion chambers.
Each offering will be available in one of two configurations. Bare (or “No Parts” in AFR vernacular) or fully assembled. The assembled heads feature the same components used in AFR’s more expensive cylinder heads, so there are no worries about any corners being cut there.
ARP rocker studs, PAC Racing valvesprings, Viton valve seals, hardened spring cups, ductile-iron valve seats, machined locks, AFR guide plates, and AFR’s stainless-steel valves are all included on the assembled heads. While the exact specs on those parts will vary by application, their quality is assured.
Big-Block Chevy Enforcer
The big-block-Chevy variant of the Enforcer heads is a 325cc rectangle-port design, which holds its own, given the price point. The 325cc intake runner flows 355cfm at .700-inch lift, and the Enforcer exhaust port actually outflows the 2101 port at .700-inch lift by 2cfm, proving the as-cast runners can perform with the big boys.
The 122cc combustion chamber houses a stainless 2.250-inch intake and a 1.880-inch exhaust valve, both in 11/32-inch stem diameter, riding in bronze valve guides. The 1.55-inch OD dual valvespring is designed for hydraulic-roller street applications. It features 175 pounds of seat pressure and will handle .725-inch of valve lift at 6,700 rpm, which should be more than enough for the intended market.
The big-block Chevy Enforcer package is meant for big-flow, even with as-cast features, such as the 325cc intake ports (left), the 122cc combustion chamber with openings for 2.250-inch and 1.880-inch valves (center), and 140cc exhaust runner.
The spring is retained by a steel 10-degree retainer and steel valve locks, coupled with adjustable pushrod guide plates. Bare heads will carry the part number 3002, while fully assembled heads will be P/N: 3001.
AFR BBC Enforcer Cylinder Head Flowsheet
LIFT 0.200 0.300 0.400 0.500 0.600 0.700 0.800 0.900 Intake 156 228 286 326 342 355 364 367
Exhaust 138 189 226 254 271 282 290 298