The PowerGLIDE ™ Steady Roll Tappets for Harley Davidson FX models from the years of construction 1985 to 1994 are equipped with an innovative role assembly group that uses a special bronze lying socket. This construction replaces the conventional needle rolls and thereby offers improved reliability and an extended lifespan of the component. The precise production makes it possible to make the tolerances closer, which leads to a much quieter operation.