580617 Breather valve spacer set .110" to .145"

This comprehensive steel breather valve spacer set is designed for late 1977 to 1999 Big Twin models, excluding Twin Cam engines. Sold as a set of 8, the kit provides a wide range of adjustment with thicknesses from .110 inch up to .145 inch in .005-inch increments. These are large-hole spacers intended for use with steel breather valves to set the correct end play within the engine case. As a mechanic's tip, always ensure you are matching steel spacers with steel valves to maintain component longevity. This kit is a reliable way to ensure your Evolution or late Shovelhead breather system is shimmed to factory specifications.