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Air Flow Research, LS1 Enforcer, Cathedral Port Heads
Features Permanent Mold "As-Cast" Technology surfaces on the intake runners, exhaust runners and combustion chambers that allows for extremely accurate and repeatable port location and performance. This budge friendly head is perfect for your OEM or mild Street Performance engine operating below 6300 RPM. They come fully assembled with the identical components found in our higher end CNC ported cylinder heads; such as PAC Racing springs, Viton valve seals, machined bead valve locks (not stamped), hardened spring seats and one piece 8mm 21 4N Stainless Steel valves.
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