Edelbrock SBC 18 4500 ManifoldEdelbrock 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