Edelbrock Polished BB Chev Rect Port RPM Air - Gap Manifold

Edelbrock part 75621 RPM Air - Gap 2 - R intake manifold is designed for street 396 - 502 c.i.d. Chevrolet V8's with high - performance rectangular - port heads. The open air space separates the runners from the hot engine oil, and as a result, the airfuel mixture stays cooler for a denser charge and more power. This intake manifold is a dual - plane, high - rise design with a 180 degree firing order to produce incredible top - end horsepower while retaining good throttle response. The larger plenum and runners match the free - flowing exhaust, high - lift cams and other modifications of a high output engine. They are intended for high - performance's street or competition engines that run up to 6500 rpm. Includes rear water outlets, two distributor clamp locations and nitrous bosses. Accepts all late model alternator and AC brackets for the street. For square - bore carbs only. No provision for exhaust heated chokes and no exhaust crossover. This manifold offers a polished finish for a brilliant shine and classic look.