For Holley Ford 1904 Carburetor Insulator Spacer Heat Soak Riser One Barrel 1/2"

This is a 1/2" phenolic insulator that fits the 1904 Holley Ford Carburetor and helps prevent carburetor boiling or heat soak. This has a bolt spacing of 2-11/16" on center with a bore of 1-1/2" in diameter.