AFR Cylinder Head Enforcer 325cc With 122cc Chamber For Big Block Chevrolet Engines

These AFR 335cc Enforcer Cylinder Heads (3001) fit 509-540 CID Big Block Chevrolet engines running with up to 6500 RPM redlines. They provide a budget-friendly performance option, completely assembled and ready to install on your engine.

Features and Benefits:
- Budget-friendly performance option
- Assembled and ready to install
- Permanent Mold “As-Cast” Technology surfaces
- Improved port location
- Great foundation for further porting

This head features Permanent Mold “As-Cast” Technology surfaces on the intake runners, exhaust valves, and combustion chambers. This allows for accurate port location and provides an excellent foundation for further port-matching.

These heads come assembled with ARP rockers studs, PAC Racing springs, viton valve seals, AFR guide plates, machined bead valve locks (not stamped), hardened spring seats, and one-piece 8mm 21 4N Stainless Steel valves. These cylinder heads are sold individually. Two are required per engine.

Specifications:
- A356 Aluminum Material
- 335cc Intake Port Volume
- 2.510"H x 1.820"W x 3/8" Radius Intake Port Dimension
- Stock Intake Port Location
- 140cc Exhaust Port Volume
- 1.690"H x 1.900" W Exhaust Port Dimension
- .357" Raised Exhaust Port Location
- 122cc Combustion Chamber Size (As Cast)
- 24°/4° Int, 15°/4° Exh Valve Angle
- 1.750" Valve Spring Pocket Diameter
- 1.750" Max Valve Spring Pocket Machining
- 0.45" Deck Thickness
- 4.25" Minimum Bore Diameter

ATTENTION: RACE USE ONLY. THESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.

Warning: Do not machine spring pad any deeper.