The most reasonably priced component used on the Jh1200-a4 Jetski Ultra 150 2002 Usa Muffler(s) is the Band,l=368.3.
In this schematic the "Washer,8.2x18x1.5" is used most often.
A sample from the products for the Muffler(s) include: Gasket,muffler Body (nas), Washer,8.2x18x1.5, Elbow, Washer,8.2x18x1.5.