The Edelbrock RPM Air-Gap Magnum #7577 intake manifold is designed for 1992 & later 5.2L (318 c.i.d.) and 1993 & later 5.9L (360 c.i.d.) Chrysler Magnum V8's, the RPM Air-Gap® manifold allows the use of a carburetor for engine swaps in early muscle cars and street rods. This dual-plane manifold design incorporates the same race-winning Air-Gap technology that’s been used on our Victor Series competition intakes for decades for outstanding performance in the 1500 to 6500 rpm range. The Air-Gap design features an open air space that separates the runners from the hot engine oil resulting in a cooler, denser charge for more power. Match with Performer RPM Magnum cylinder heads #61779 for maximum performance.