Check out any of the twenty-four Alternate (exhaust) components enlisted.
A sample from the products for the Alternate (exhaust) include: Nut, Flange(38w), Protector, Muffler 1, Bolt Stud 811135580000, Washer, Plate (4r4).
The component with the lowest price in the ALTERNATE (EXHAUST) schematic is the Bolt.