Harley Davidson No-Return Crankcase Breather Big Twin & Sportster 75 and Up BC16684

Special no-return valve improves performance and significantly reduces the build up of pressure that can cause oil leaks and seepage at gasket joints. Complete with a one-piece filter molded to a lightweight decorative end cap, a chrome zinc die-cast mounting base with 5/16" inlet and hose clamp. Fits Big Twin and Sportster models from 75-Up when the stock breather hose has been re-routed