AFR 335cc/ 122cc Enforcer Cylinder Head BBC

Large-displacement Big Block Chevy engines demand increased airflow and stable valvetrain control. This cylinder head supports 509-540 cubic inch combinations operating up to 6,500 RPM. The as-cast technology maintains accurate port placement while providing a consistent foundation for additional port matching. Each head is assembled with ARP rocker studs, PAC Racing springs, Viton valve seals, AFR guide plates, machined bead valve locks, hardened spring seats, and one-piece 8mm 21-4N valves.

Features and Benefits:
- A356 aluminum casting reduces weight and improves heat control
- 335cc intake runner supports 509-540 cubic inch engines
- 122cc as-cast combustion chamber manages large displacement compression
- Permanent Mold as-cast surfaces maintain precise port location
- .357" raised exhaust port improves exhaust flow path
- Assembled with ARP studs and PAC Racing springs
- 0.45" deck thickness supports high cylinder pressures
- 4.25" minimum bore diameter compatibility

Specifications:
- Material: A356 aluminum
- Intake port volume: 335cc
- Intake port dimension: 2.510" H x 1.820" W x 3/8” radius
- Intake port location: stock
- Exhaust port volume: 140cc
- Exhaust port dimension: 1.690" H x 1.900" W
- Exhaust port location: .357” raised
- Combustion chamber size: 122cc
- Valve cover bolt pattern: perimeter bolt
- Valve angle: 24/4 degrees (intake), 15/4 degrees (exhaust)
- Valve spring pocket diameter: 1.750" OD
- Max valve spring pocket machining: 1.750" OD (warning: do not machine spring pad any deeper.)
- Deck thickness: 0.45”
- Minimum bore diameter: 4.25”

Vehicle Fitment:
- Fits Big Block Chevy Engines

Please Note: Sold individually. Two are required per engine. Race use only.