The most reasonably priced component used on the Gs500f 2005 (k5) Usa (e03) Front Master Cylinder (gs500fk4/k5/k6) is the Protector.
This FRONT MASTER CYLINDER (GS500FK4/K5/K6) assembly utilises four Washer(s) - the highest specified component.
Of all the components used in this assembly the Cylinder Assy is the most expensive.