Edelbrock Part # 7585 RPM Air-Gap Dual-Quad 351W intake manifold is designed for 351W small-block Fords. This intake offers performance improvements in the 1500-6500 rpm range. The large runners feature our unique Air-Gap design that separates the runners from the hot engine valley for a cooler, denser charge and more horsepower. Includes bosses for rear water crossover....