The lowest price component in this Exhaust parts-list fiche is the Washer, Plain.
The sub assemblies and components that make up this Exhaust include this Muffler Assy 1, the most expensive part.
Some items from this specific schematic: Bolt, Flange(3hp), Gasket, Exhaust Pipe (nas), Cover, Exhaust, Bolt, Flange(4fm).