Edelbrock Manifold Performer RPM GM LS3 Carbureted 4150 Series FlangeEdelbrock part #71197 Performer RPM LS3 intake manifold is designed for Gen IV engines with LS3, L92 and L76 rectangular port cylinder heads. The Performer RPM LS3 manifold is ideal for anybody looking to build a carbureted LS3 or LS2 engine with an operating range between 1,500 6,500 rpm. It allows the use of a carburetor on these originally computer controlled engines, offering maximum power and a broad torque curve. It features a high rise dual