AFR LS3 Enforcer 72cc Chamber As-Cast 238cc Cylinder Head
Highlights
- 238cc LS3 Enforcer Design
- As-Cast Performance Upgrade
- Fully Assembled Head
- Budget Friendly LS Option
AFR LS3 Enforcer As-Cast 238cc Cylinder Head with 72cc Combustion Chamber for 1960-1987 Chevy C10s and 1988-1998 Chevy C/K Trucks.
Upgrade airflow and valvetrain reliability in your LS build with this cylinder head (1803). It is designed as a cost-effective performance improvement over factory LS3 castings. This head delivers increased airflow at low and mid valve lift while maintaining stock port locations for straightforward compatibility. Permanent mold as-cast intake, exhaust, and combustion chamber surfaces provide consistent port geometry and repeatable performance. The head supports stronger throttle response.
Features and Benefits:
- As-cast intake, exhaust, and combustion chambers
- 238cc intake ports improve airflow over stock
- 72cc combustion chamber supports balanced compression
- Smaller port design enhances low lift performance
- Fully assembled with premium valvetrain components
- PAC dual valve springs support hydraulic roller cams
- Stainless steel intake and exhaust valves
- Stock LS3 port and bolt locations
- Designed for engines operating below 6300 RPM
Kit Includes:
- 100% as-cast combustion chamber
- 100% as-cast intake and exhaust ports
- Competition 5-angle valve job
- 8mm bead lock intake valve, 2.080" x 5.200" overall valve length
- 8mm bead lock exhaust valve, 1.600" x 5.205" overall valve length
- PAC racing spring 1.290" OD hydraulic roller dual valve spring, 140 lbs on seat, .600" maximum lift, 6300-6500 max RPM
- 7-degree chrome moly retainers 1.245" OD x .885" ID x .655" ID
- 7-degree bead lock valve keepers
- Viton valve seals .600" OD x .495" ID
- Hardened valve spring OD locator 1.380" OD x .570" ID
- Rocker rail stand
Specifications:
- Material: A356 aluminum
- Intake port dimensions: 2.540" H x 1.190" W x 7/16
- Intake and exhaust port location: Stock
- Exhaust port volume: 92cc
- Exhaust port dimensions: 1.500" H x 1.740" W
- Valve cover bolt pattern: Center bolt
- Valve angle: 12 degrees
- Valve spring pocket diameter: 1.490" OD
- Max valve spring pocket machining: 1.510" OD
- Deck thickness: .750"
- Minimum bore diameter: 4.000"
- Flat mill: 65cc chamber, .006" per cc, 62cc maximum
- Minimum cross-sectional area: 2.680 sq. in.
- Spark plug dimensions: 14mm x .750" with tapered seat
Recommended Components:
- Head gasket: Cometic 4.160" x .040"
- Intake port gasket: GM or aftermarket
- Exhaust port gasket: GM #12558573
- Head bolts: (04+) ARP #134-3610
- Head studs: (04+) ARP #234-4317
- Head bolt washers: Manley AFR #6320
- Suggested intake manifold: FAST 90mm, 92mm, or 102mm
- Spark plug starting range: NGK TR55
Vehicle Fitment:
- 1960-1987 Chevy C10s
- 1988-1998 Chevy C/K Trucks
California Residents: Proposition 65 Warning
Related Categories: C10 Cylinder Heads, C10 Restomod Engine, C/K Engine, C/K Restomod
Only for use on pre-pollution controlled vehicles: This product can be used on vehicles that were manufactured before emissions control regulations were imposed. Pre-pollution vehicles are defined as:
- 1965 and older U.S. manufactured California certified vehicles
- 1967 and older U.S. manufactured federally certified vehicles
