Convert your GM LS engine from EFI to Non-EFI carburettor in retro-fit applications with this Aeroflow Performance hi rise (Super Victor Style) cast intake manifold. This single-plane intake manifold is designed to keep your air and fuel distribution going into the engine at a steady and even flow for maximum performance and efficiency. The carburettor-mounting pad is designed to accept aftermarket 4150 square-bore carburettors with either manual or electric choke options available on today’smarket. Specifically designed to suit GM LS Gen III and IV engines equipped with OE or aftermarket LS1/LS2 cathedral port cylinder heads. This product is intended for carburetted, throttle body EFI, or port EFI applications.This manifold is a Hi-Rise race style manifold designed for high rpm and large cubic inch engines.• Fits GM LS1/LS2 Cathedral Port Engines.• Non-EFI Applications.• Fits GM LS1/LS2 Engines.• Single Plane Configuration.• RPM operating range - 3500 to 8000.• Black Finish.•- Intake manifold Flat style gasket (must use Fel Pro 1312-2 or 1312-3).