Fits 2300 Holley 4412 0-4144-1 & 0-4365 Carb Riser Phenolic Insulator Spacer GM Ford 1/2" K

This 1/2" thick phenolic riser for the Holley 2300 4412 0-4144-1 & 0-4365-1 carb and will fit other models as well. Add a little performance to your machine the cheap way, and keep the heat away from the carburetor to solve the heat soak or carburetor boiling issues.