On this parts fiche the Washer-spring,6mm is the most specified component.
The sixteen Ksf450-b8f Kfx450r 2008 Usa Muffler(s) component parts are all listed in this schematic.
Some items from this specific schematic: Bolt,socket,6x11, Bolt-socket,6x10, Gasket,arrester (nas), Cover-exhaust Pipe,rr.