One (1) manifold for sale in this listing. New Old Stock (NOS) Accel TurboSonic exhaust manifold for a draw through turbocharging system for small block Chevy V8 engines. T4 turbo flange: 2.75" x 3.25" bolt hole pattern.
Round exhaust port below turbo flange has 3 bolt hole center to center. Head bolt flanges are a substantial 2.25 thick. Manifold weighs 15 pounds 8 ounces. Small block Chevy V8 engines: 350, 305, 400, 383, 355, 307, 283, 327, 267, 302, 406. Will not fit Chevy LS based engines.
Second gen LT1 and LT4 engines could be made to use this manifold, with a significant amount of fabrication for the cold and hot side plumbing. Search online for "Accel TurboSonic" for more info. I'm happy to answer any questions.