The most reasonably priced component used on the Gs450l 1980 (t) Usa (e03) Front Caripers is the Bolt(10x37).
This schematic depicts all components used in the Gs450l 1980 (t) Usa (e03) Front Caripers partslist.
The sub assemblies and components that make up this Front Caripers include this Caliper Assembly,front,left, the most expensive part.