Edelbrock part #75354 RPM Air-Gap Dual-Quad intake manifold is designed for 289-302-347 c.i.d. small-block Ford V8 applications. This intake manifold is a dual plane design which combines dual four-barrel excitement with a well-mannered street manifold. The intake is taller than the low-profile F-28 intake and 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. Carb center to carb center is 6-7/16". This manifold offers our long lasting bright chrome like EnduraShine finish that matches chrome and polished accessories.