The Bolt-upset-wsp is the cheapest item from this partsfiche.
The Fenders is made up of components including this Fender-comp-rear,rr,l which is the most expensive.
Parts such as the Fenders: Nut,5mm, Nut,lock,5mm, Brace,fender,l.p.blue, Bolt,flanged,8x16 are included in the Z550g5 Gt550 1988 Sweden Fg Fenders parts fiche.