Edelbrock part 7163 Performer RPM 2 - R intake manifold is designed for street 396 - 502 c.i.d. Chevrolet V8's with high - performance rectangular - port cylinder heads. This dual - plane high - rise manifold offers maximum horsepower with a broad torque curve. No provisions for exhaust heated chokes. Accepts late - model waterneck, air - conditioning, alternator and HEI equipment.