Every motor vehicle operated within the city shall be provided with a muffler in good working order to prevent excessive or unusual noise or smoke. No person shall modify or change the exhaust muffler, intake muffler, or any other noise abatement device of a motor vehicle in a manner such that the noise emitted by the motor vehicle is increased above that emitted by the vehicle as originally manufactured. It shall be unlawful to use a “muffler cut-out” on any motor vehicle upon any street; provided, the provisions of this section shall not apply to authorized emergency vehicles.
(Neb. RS 60-6,286, 60-6,370) (Prior Code, § 5-321) Penalty, see § 71.999