Allstar Performance Holley 4500 Open Carb Spacer - 1/2" Thick 2010191 As a pioneer of ceramic

As a pioneer of ceramic friction technology

but may be trimmed to fit many applications

Multiple Layer

Also sold each

Allstar Performance Holley 4500 Open Carb Spacer - 1/2" Thick 2010191 As a pioneer of ceramicSpecially 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",