The Edelbrock Victor Olds 455 #2811 drag racing intake manifold provide power levels never before available for competition single-carb 455 Olds engines. In independent flow testing, our port-matched design out-flowed the best fully ported manifolds on the market. Featuring a single-plane “Air-Gap” design, designed for 4500 Series carbs to accommodate many competition applications, and offer significant horsepower increases over existing intakes in the 4500 to 7500 rpm range. With a carb mount pad height of 8.2", this manifold stand more than three inches taller than the Edelbrock Torker manifold and incorporate a high-flow 3.4-square-inch runner. We’ve removed the intake bolts between the runners, thus creating a smoother airflow path for higher airflow and more power! Edelbrock Victor Olds 455 #2811 intake manifold features a port size and shape that has been optimized to match the flow characteristics of Edelbrock Performer RPM #60519 aluminum cylinder heads.