Cometic .020 Stock Bore Base Gaskets For Harley Shovelhead Features: Steel Viton coated base gaskets Cometic Gaskets advanced engineering and manufacturing process allows them to bring you the best availible gaskets for your bike Design engineers have the ability to analyze the environment the gasket will perform in, select the proper material, and apply the appropriate technology to offer the highest performing gaskets available on the market .020 thick Stock bore Sold in pairs