Parts such as the Muffler (only For Ym2c): Gasket, Muffler Joint (mca), Spring, Muffler, Exhaust Pipe Assembly (l.h.), Bolt (663) are included in the Ym2c 1967 Usa Muffler (only For Ym2c) parts fiche.
The Muffler (only For Ym2c) is made up of components including this Silencer which is the most expensive.