The most expensive part in this assembly is the Body,muffler.
In this schematic the "Stud 6x16" is used most often.
The most reasonably priced component used on the Lt250r Quad Racer 1988 (j) Usa (e03) Quadracer Quad-racer Muffler (model H/j/k/l/m/n) is the Gasket(12.1x16.2x3.7) (nas).