Will not fit under stock hood of Corvette, 1964-67 Chevelle or 1967-81 Camaro. Available with satin, polished, black powder coated or EnduraShine finish., 1500 6500 RPM Range The RPM Air-Gap 2-O #75613 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 Chevy V8s with large oval-port cylinder heads (1975 and earlier) or Edelbrock Performer/Performer RPM heads. Designed for street 396-502 c., i., d. Intake Manifold, Edelbrock, RPM Air-Gap, Oldsmobile 455 Edelbrock 75613 RPM Air-Gap 2-0 Intake Manifold Includes rear water outlets, two distributor clamp locations and nitrous bosses. No provision for exhaust heated chokes and no exhaust crossover. Dual Plane Type 4150 Style Flange , 4., 45 in., Front Height, 5., 22 in., Center Height, 6 in., Rear Height Edelbrock 75613 Rpm Air-gap Intake Manifold 1 Edelbrock 75613 RPM Air-Gap Big Block Chevy 2-O Black Intake Edelbrock 75613 Rpm Air-gap Intake Manifold Kit Black Powder Coated Finish , Non EGR.