Of all the components that make up this Muffler the Washer,plain 6mm has the lowest price.
Some items from this specific schematic: Bolt,flange,6x10, Washer,plain 6mm, Packing,protector (nas), Muffler Comp,exh..
The Muffler is made up of components including this Muffler Comp.exh which is the most expensive.