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Maine Exhaust & Muffler Laws (2026)

Info: Your vehicle needs an adequate muffler, cutouts and bypasses (which route exhaust around the muffler) are barred along with changes that increase noise, and a car over 95 decibels, measured by the SAE J-1169 test, is in violation (Me. Rev. Stat. 29-A § 1912).

InfoVerified Jun 19, 2026

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Official source: legislature.maine.gov →

General legal information, not legal advice — verify important decisions with a licensed attorney.

Exhaust & Muffler in states bordering Maine

The same rule in each neighboring state LawLert has verified, from that state’s own official source.

New HampshireInfo
Your vehicle needs a muffler in good working order, and cutouts, bypasses (which route exhaust around the muffler), and straight-pipe exhaust are prohibited. New Hampshire sets no decibel limit for cars — the decibel limit in 266:59-a applies only to motorcycles (N.H. RSA § 266:59).
Verified Jun 19, 2026 · Source: gencourt.state.nh.us · Full New Hampshire rule →

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