Allstar Performance Holley 4500 4-Hole Carb Spacer - 1/2" Thick Data Acquisition MAC Air Pumper Features: 2

MAC Air Pumper Features: 2 Person helmet outlet

converts your shield into the highest performing Anti Fog

3 in Element

ACME threads for high strength

Allstar Performance Holley 4500 4-Hole Carb Spacer - 1/2" Thick Data Acquisition MAC Air Pumper Features: 2Specially 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",