The new Edelbrock Performer RPM Air-Gap Oldsmobile 455 intake manifold is intended for aggressive street/strip big-block Olds applications. Designed to optimize horsepower production from 1500 to 6500 rpm, this manifold will perform best with engines that have an aggressive camshaft profile that will take advantage of the increased flow this manifold can provide. This manifold features our popular Air-Gap design that separates the runners from the hot engine oil, resulting in a cooler, denser air charge for more power. This manifold is compatible with stock heads, but has been designed to work with our RPM cylinder heads #60519 for optimal performance. Not compatible with EGR or spread-bore carburetors. Edelbrock RPM Air Gap Intake Manifold 7551 Non-EGR - 1500-6500rpm - Street/Hi Performance Use - Intake Manifold OnlyFor Street/Strip Apps In 1500-6500 RPM RangeAir Gap Cooler and Denser Mixture for More PowerNot Compatible w/EGR Or Spread-Bore CarbsDesigned To Match PN Cylinder HeadsMade In USA Under High Quality StandardsApplications include: 442, 98, Bonneville, Catalina, Centurion, Century, Custom Cruiser, Cutlass, Cutlass Salon, Cutlass Supreme, Delta 88, Electra, Estate Wagon, F85, Grand Safari, Gs 455, Lesabre, Riviera, Skylark, Toronado Pit Stop USAoffers Edelbrock RPM Air Gap Intake Manifold 7551 at low everyday prices. Be sure to check out all of the products from Edelbrock including Edelbrock Engine Parts and Accessories, Edelbrock Intake Manifolds, Edelbrock Intake Manifolds - Oldsmobile.