The most reasonably priced component used on the Vf700c Magna 1984 (e) Usa California Muffler '84 is the Washer,plain, 6mm.
Some items from this specific schematic: Band,ex.pipe, Nut, Flange, 8mm, Band,l.ex.pipe, Muff Comp R.
On this parts fiche the Bolt,flange,8x37 is the most specified component.