25327-79 Steel Breather Valves

For Big Twin owners looking for the ultimate in crankcase pressure control, this S&S Cycle steel breather valve is the professional choice. It replaces OEM 25327-79 and is compatible with Dyna, FXR, Softail, and Touring models. This precision-machined steel valve is designed to replace both the early steel valves used from 1936 to 1989 and the later plastic versions found in 1990 to 1999 engines. By moving to a steel valve, you gain better resistance to wear and more reliable timing of the breathing cycle. This is particularly important in high-performance builds where crankcase pressure management is critical for preventing oil leaks. It’s a high-quality upgrade that ensures your Harley’s bottom end stays dry and efficient for years to come.