Compatibility: For Chevy SBC 305 350 383 Descripition: Made of high-quality aluminum with a natural finish, dual plane intake style 100% Brand New,never been used Intake Manifold delivers superior performance with square-bore carburetors Professional Installation is Highly Recommended RPM Range: Idle to 5500 RPM Package including: 1 X Intake Manifold As shown in the picture Brand sulantopone Type Intake Manifold Manufacturer Part Number Does Not Apply .