The Rear Shock Absorber assembly is constructed from several parts from which the Shock Absorber, Rear is the most expensive.
This part-list fiche shows all the components that make up the Gsx550ef 1985 (f) (e01 E02 E04 E06 E17 E18 E21 E22 E24 E25 E34) Rear Shock Absorber .