--Finish: Satin --Square Bore (non-EGR). --Idle to 5500 RPM. --Material: Cast Aluminum --Port exit dimensions: 1.17" x 1.90". --Estimated runner length - Shortest: 4.00". --Estimated runner length - Longest: 7". --Manifold height: (A) 4.29", (B) 5.31". --Will also Fit 1987-Up stock aluminum heads (does not fit 1987-Up cast iron or Chevrolet Bow Tie heads). --Accepts late model choke, water neck, AC, alternator, and HEI. --Package: Including all items in the picture. Note: Professional Installation is Highly Recommended.
