C10031 Gasket valve guide. Fiber

This Cometic valve guide gasket is crafted from rubber-coated fiber to provide a superior seal for vintage Knucklehead top ends. It is a direct replacement for OEM 18265-37 (also referenced as 176-37) and is designed for 1936 to 1947 Knucklehead models. The rubber coating on the fiber core allows the gasket to conform to the irregularities often found in older castings, providing a much better seal than plain fiber or paper alternatives. When you are rebuilding a pre-war or early post-war Big Twin, using modern sealing technology like this from Cometic is the best way to ensure your hard work isn't undone by oil leaks.