508039 Muffler reducer sleeve from 1-3/4"to 1-1/2"

This zinc-plated steel reducer sleeve is a handy bit of kit when you're trying to mate different exhaust components. It's specifically designed to allow the installation of mufflers with a 1-3/4 inch inside diameter onto 1-1/2 inch outside diameter head pipes. This is a common requirement for 45 inch Flathead models where you're looking to run a slightly larger muffler than stock. It provides a solid, snug fit to ensure your exhaust system remains leak-free. Whether you're restoring a classic or building a custom Flathead, this sleeve, which matches OEM 508039, is a simple solution for exhaust sizing issues.