Some items from this specific schematic: Bolt-flanged-small,6x, Gasket (nas), Gasket,5.8x12x1.5 (nas), Nut,8mm.
The lowest price component in this Muffler(s) parts-list fiche is the Nut,8mm.
The sub assemblies and components that make up this Muffler(s) include this Body-assy-muffler, the most expensive part.