Edelbrock Intake Manifold Performer Air-Gap S/B Chevy 87-95 STD Flange/SprdboreEdelbrock part #2604 Performer Air Gap intake manifold is designed for 1987 95 cast iron heads with canted center bolt holes small block Chevys. This design features an open air space that separates the runners from the hot engine oil resulting in a cooler, denser charge for more power. High velocity runners deliver excellent throttle response throughout the power band. The great looks of the Performer Air Gap along with the solid idle to 5500 rpm