On this parts fiche the Nut-hex-small is the most specified component.
The sub assemblies and components that make up this Muffler(s) include this Body-comp-muffler, the most expensive part.
Some items from this specific schematic: Nut-hex-small, Stud,8x18, Bolt-flanged,m8x16, Washer,8.5x20x1.6,bla.