The sub assemblies and components that make up this Pedal '85-'89 include this Arm,rr.brk.stpr., the most expensive part.
In this schematic the "Collar,stpr.arm" is used most often.
A sample from the products for the Pedal '85-'89 include: Pedal Comp.,chang, Dust Seal,13x18x3, Pedal Comp.,brake, Oil Seal.