Edelbrock part #2859 Victor Glidden intake manifold is for all-out nitrous-assisted drag race applications. Designed with noted drag racer Billy Glidden, it features intake runners with a large cross-section area of 3.2 square-inches for maximum high-end horsepower in engines operating from 5000 to 8500 rpm with GM or Edelbrock 18-degree heads. Carb mount flange and plenum are machined for 4500 Series carburetors and require port matching and blending prior to use. The Edelbrock Victor Glidden is a single-plane, high-rise intake designed for maximum race-winning power at higher engine speeds.