Intake Manifold Olds 403 Eldelbrock 2711 seriesPerformer Olds 350 Intake Manifold is designed for street 307 330 350 403 c. i. d. Oldsmobile V8's, 1966 85. For non EGR fitted vehicles.. this has no provision for a EGR Valve.(another we have does) for those that don't want to fit one, the manifold comes with a universal pad to fit most carburetors with electric chokes. For performance gains on cars without functioning shaker assembly.. so not for 77 79 Trans Am where the original carby mounted air