


Engine Cylinder Head Assembly Model or Series: Enforcer
Make: Chevy
Engine: 396 to 454
Material: Aluminum
Combustion Chambers: 122 cc
Intake Valve Diameter: 2.250 in.
Exhaust Valve Diameter: 1.880 in.
Intake Runners: 325.00 cc
Exhaust Runners: 140.00 cc
Port Style: Rectangular
Cam Type Recommended: Hydraulic Roller
Max Valve Lift: 0.725 in.
Valve Spring OD: 1.550 in.
Closed Spring Pressure: 194 lbs. @ 1.950 in.
Open Spring Pressure: 500 lbs. @ 1.300 in.
Spring Rate: 469 lbs/in.
Coil Bind: 1.150 in.
Valve Spring Retainer Material: Steel
Valve Material: Stainless Steel
Quantity: Sold As Each
AFR's 325cc BBC Enforcer Cylinder heads feature our Permanent Mold “As-Cast” Technology surfaces on the intake runners, exhaust runners and combustion chambers that allows for extremely accurate and repeatable port location/performance. This budget friendly head is perfect for your 509 to 540 Cubic Inch operating below 6500 RPM.
They come fully assembled with the identical components found in our higher end CNC ported cylinder heads; such as ARP rockers studs, PAC Racing springs, viton valve seals, AFR adjustable guide plates, machined bead valve locks (not stamped), hardened spring seats and ductile iron seats (not powdered metal) our one piece 8mm 21 4N Stainless Steel valves. They are available without any parts for the DIY. Sold as a single piece, 2 are required per engine. Please see footnotes for additional information.
PerformanceParts is an authorized reseller of Air Flow Research
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Request a return authorization through your eBay account. Wait for an RGA number to be issued Write the RGA number on the outside of your shipping box, and ship the item. Wait for the return to process and refund to be received. This process may take up to 5 days. Most returns are processed within 24 hours.
They come fully assembled with the identical components found in our higher end CNC ported cylinder heads; such as ARP rockers studs, PAC Racing springs, viton valve seals, AFR adjustable guide plates, machined bead valve locks (not stamped), hardened spring seats and ductile iron seats (not powdered metal) our one piece 8mm 21 4N Stainless Steel valves. They are available without any parts for the DIY. Sold as a single piece, 2 are required per engine. Please see footnotes for additional information.
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