This is a 1/4" phenolic carb insulator that helps prevent carburetor boiling or heat soak.  This has a bore of 1-9/16" and a bolt hole distance of 2 11/16" center to center, the outside dimensions are 2-7/16" x 3-17/32"  Any questions please email at Dashman's Hot Rod & Speed Parts.

Includes free sticker!!