With a quantity of four pieces, the Washer, Plate(3mb) is the most used part in the EXHAUST diagram.
The Exhaust is made up of components including this Exhaust Pipe Assy 1 which is the most expensive.
Some items from this specific schematic: Screw, Binding (8g6), Pipe, Outlet, Gasket, Exhaust Pipe (nas), Washer,spring.