Allstar Performance Holley 4500 4-Hole Carb Spacer - 1/2" Thick 31013BK Under frame kit designed to

Under frame kit designed to work with most in bed hitches

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NOTE: For A3000 Fuel Pump

Allstar Performance Holley 4500 4-Hole Carb Spacer - 1/2" Thick 31013BK Under frame kit designed toSpecially designed for drag race applications to isolate carburetor from manifold, spacers prevent horsepower robbing heat transfer and increase the distance from the bottom of the carburetor to the manifold plenum for better air flow. Spacers are CNC machined in the U. S. from a polymer compound able to withstand temperatures up to 400F. Available in open or four hole versions for 4150 and 4500 series Holley and Holley style carburetors in 1 2", 1",