Mont. Code Ann. § 61-9-403

Mufflers -- prevention of noise

Last amended: 1955Year: 2026Length: 82 wordsOfficial source
61-9-403 . Mufflers -- prevention of noise. (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.
Mont. Code Ann. § 61-9-403: Mufflers -- prevention of noise | Justis AI