The twenty-five Dl650a Vstrom 2011 (l1) Usa (e03) Muffler component parts are all listed in this schematic.
The Bolt is the cheapest item from this partsfiche.
A sample from the products for the Muffler include: Nut,muffler Support Fr, Spacer(8.6x12x24.2), Cushion, Pipe,exhaust Rr.