Edelbrock 351 Cleveland RPM AIR-GAP Manifold.
Designed to improve performance on the street or racetrack, the RPM Air-Gap 351 Cleveland manifold features an open space that separates the runners from the hot engine oil resulting in a cooler, denser charge. The Edelbrock air-gap design utilises the same race-winning technology that’s been used on Edelbrock’s Victor Series competition intakes for many years.