DUAL-QUAD HEMI® (2,500-6500 RPM) These Dual-Quad HEMI intake manifolds are intended for use with Mopar Gen II (1964-71) 426-572 HEMI engines operating in the 2,500 to 6,500+ range. These new intake manifolds are a single-plane Air-Gap® design with a dual square-bore 4150 style carburetor pad. Carburetor spacing and height are the same as Mopar Performance dual-quad #P5153737, making it a direct bolt-on to all vehicles with a shaker hood. They also retain the same carburetor linkage location from the factory. The Dual-Quad HEMI is compatible with factory style cylinder heads, but optimized for use with Edelbrock Victor Jr. HEMI cylinder heads. Requires Edelbrock Coil Bracket #8079 for use with OE style coils. * CARB RECOMMENDATIONS: Edelbrock Thunder Series AVS or Performer Series (600-800 cfm) Carburetor. ** THROTTLE BODY RECOMMENDATIONS: Edelbrock #38783 with progressive linkage #7094. *** FUEL RAIL RECOMMENDATIONS: Use Edelbrock fuel rail kit #3660 with Edelbrock injectors #3686. **** INSTALLATION NOTE: Recommended intake gasket: Edelbrock #7278. Manifold height: A-4.68", B-5.51"; Carb pad height: 5.10". Port exit dimensions: 1.80" x 1.98".