JEGS Intake Manifold Compatible With Chevy Small Block 1955-1986 - Non-EGR Design - Idle - 5500 RPM Power Range - Cast Aluminum - Square Bore Carburetor Mounting Pad

JEGS Intake Manifold1955-1986 Small Block 265-283-302-327-350-400Dual Plane4-BBL Square Bore 4150/4160 Mounting Flange(non-EGR)Idle to 5500 RPMCast AluminumNatural Finish Port exit dimensions: 1.17" x 1.90"Recommended Intake Gasket For Apps without Heat cross overuse JEGS p/n 555-210002Recommended Intake Gasket For Apps with Heat cross overuse JEGS p/n 555-210004Intake gasket port matching is recommended for optimum performanceEstimated runner length - Shortest: 4.00"Estimated runner length - Longest: 7.00"Manifold height: (A) 4.29", (B) 5.31"Click here to determine carburetor pad height.Also Fits 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 HEINo provision for divorced or heated chokeStock/stamped steel valve covers may require 3/16" (or thicker) valve cover gaskets. We recommend 555-21100, 555-210075, or 555-210070 for adequate runner clearance.

• Improve engine performance and horsepower with this higher flowing intake manifold compared to a stock cast iron intake.
• Designed to fit with popular aftermarket square bore 4150 carburetors including Edelbrock, Holley, Quickfuel, Proform, and more!
• Idle to 5500 RPM power band for street or mild race applications.
• Fits cylinder heads from 1955 through 1986.