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Mississippi Exhaust & Muffler Laws (2026)
Info: Every motor vehicle must be equipped with a muffler in good working order and in constant operation to prevent excessive or unusual noise and annoying smoke, and no one may use a muffler cutout, bypass or similar device on a highway (Miss.
Every motor vehicle must be equipped with a muffler in good working order and in constant operation to prevent excessive or unusual noise and annoying smoke, and no one may use a muffler cutout, bypass or similar device on a highway (Miss. Code § 63-7-55). Mississippi sets no decibel number. Violations of Title 63, Chapter 7 are misdemeanors (§ 63-9-11).
Official source: driverservicebureau.dps.ms.gov →
General legal information, not legal advice — verify important decisions with a licensed attorney.
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