Polished Aluminum Intake Manifold for Big Block Chevy High Rise, Dual Plane

Polished Aluminum High Rise Intake Manifold dual plane manifold for Chevrolet Big Block 396-502 engines. Its dual carburetor bolt pattern allows you to use a spread-bore Quadrajet style or a square-bore Holley 4150/4160 or Edelbrock style Carburetor. Features: Fits Big Block Chevy 1965 - 1990 396, 402, 427, 454, 502 Engines with Oval Port Heads Dual Plane design Polished Aluminum Finish Basic Operating RPM Range is idle-6,000 Intake Manifold Height is 5.75 inches. Dual Carburetor bolt pattern for spread bore and square bore carburetors Includes square bore plate & gasket 2 Front and Rear 1/2 in. NPT water outlet ports for additional cooling 1 Rear 3/8 NPT vacuum port Provision for divorced or heated choke Includes heat choke block off plate