The most reasonably priced component used on the Cbx250rs 1984 (e) England F-18 Exhaust Muffler is the Rubber A,stand.
The F-18 Exhaust Muffler is made up of components including this Muffler R.ex. which is the most expensive.
In this schematic the "Nut, Flange, 8mm" is used most often.