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(1) Every motor vehicle shall at all times be equipped with a muffler in good working order and in constant operation to prevent excessive or unusual noise and annoying smoke, and no person shall use a muffler cutout, bypass, or similar device upon a motor vehicle on a highway.
(2) The engine and power mechanism of every motor vehicle shall be so equipped and adjusted as to prevent the escape of excessive fumes or smoke.
Cite this article: FindLaw.com - Montana Title 61. Motor Vehicles § 61-9-403. Mufflers--prevention of noise - last updated April 27, 2021 | https://codes.findlaw.com/mt/title-61-motor-vehicles/mt-code-ann-sect-61-9-403/
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