PERFORMER RPM: A dual-plane, high-rise manifold designed with a 180° firing order produces incredible top-end horsepower while retaining great throttle response. Their larger plenums and runners match high-lift cams, free flowing exhausts and other modifications of a performance engine. Great for street or strip.
RPM AIR-GAP: The RPM Air-Gap offers the same proven qualities of the Performer RPM but with the addition of Edelbrock's patented Air-Gap. The Air-Gap design features an open air space that separates the runners from the hot engine oil for a cooler, denser charge for more power.