EDELBROCK RPM AIR-GAP DUAL QUAD MANIFOLD, ALUMINUM, SOLD INDIVIDUALLY -- 49-state legal; Not for sale or use in California; Cannot be shipped to California addresses; Optimized for maximum power from 1500 to 6500 rpm; 5.05 in. x 5.64 in. height; 5.35 in. carburetor pad height; 0.98 x 2.72 in. port exit; Non-EGR; Includes timing control module; Delivers outstanding performance and broad torque band throughout its rpm range; Designed for LS1 engines.