In this schematic the "Bolt,flange,8x37" is used most often.
Some items from this specific schematic: Protector,rr.ex.p, Washer,plain, 6mm, Nut,flange,6mm, Rubber A,stand.
The lowest price component in this F-20-1 Exhaust Muffler parts-list fiche is the Washer,plain, 6mm.
