portion of the first muffler body and an outflow pipe to communicate the first second and or third chamber with the outside by passing through the other end portion of the last second muffler body application_number US 48303209 A description reference will now be made in detail to various embodiments of the present invention s examples of which are illustrated in the accompanying drawings and described below while the invention s will be described in conjunction with exemplary embodiments it will be understood that present description is not intended to limit the invention s to those exemplary embodiments on the contrary the invention s is are intended to cover not only the exemplary embodiments but also various alternatives modifications equivalents and other embodiments which may be included within the spirit and scope of the invention as defined by the appended claims fig4 is an exploded and assembled perspective view of an exemplary muffler for a vehicle according to the present invention in which a muffler is formed by fitting a plurality of separate first second and third muffler bodies 21 23 25 to each other first muffler body 21 is constructed such that an opening is formed at one side of a cylinder having a predetermined volume therein whereas the other front side opposite to the opening is closed except for a boss 21 a having a through hole to fit a pipe and integrally formed with the cylinder the cylinder is formed of a large diameter portion 21 b.