2337S Steel breather valve. STD

This JIMS steel breather valve is a high-quality replacement for the stock plastic or worn metal units. It is manufactured from aerospace-quality steel and CNC machined to exacting standards to ensure reliable crankcase breathing. This standard size valve is designed to work with late 1979 to 1999 style steel breather valve thrust washers for a complete setup. It fits late 1977 to 1999 Big Twin models, excluding Twin Cam engines, and naturally replaces OEM number 25313-77C. It is an essential component for maintaining proper oil scavenging and preventing pressure build-up in the bottom end of your Evolution or Shovelhead motor.