S&S ROCKER ARM SHAFT SET. INCLUDES 4 SHAFTS. REPLACES OEM# 17611-83 MFG# 90-4036 FITS EVOLUTION BIG TWINS 1984 TO PRESENT
Source: Custom Chrome
Hardened aircraft steel and pressed in bushings give these rocker arms the highest wear resistance and durability possible. For use in Evolution® Big Twins from 1984 thru 1999 with cam lifts to .710" and Evolution® Sport-ster® models from 1986 thru 2003 with cam lifts to .650". Designed for use with adjustable pushrods to obtain correct valve lash adjustment. S&S recommends new rocker arm shafts for maximum performance and mileage.