This Rear Arm Comp. is the most expensive of the items that make up this Rear Arm - Suspension Xj550h/j/k assembly.
twenty components are shown in this Xj550 Seca 1981 (b) Usa Rear Arm - Suspension Xj550h/j/k exploded diagram.
In this schematic the "Bush (5a9)" is used most often.