§ 71.133 MUFFLERS; CUT-OUTS.
   No motor vehicles with an internal combustion engine shall be operated within the city unless the exhaust from such engine is muffled by a suitable and sufficient muffler. No muffler cut-out or exhaust or vacuum whistle shall be used on any motor vehicle while operating within the city, except that exhaust whistles may be used on authorized emergency vehicles.
(`83 Code, § 15-304) Penalty, see § 71.999