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Maryland Exhaust & Muffler Laws (2026)

Info: Your vehicle needs a muffler in good working order.

InfoVerified Jun 19, 2026

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Your vehicle needs a muffler in good working order. Muffler cutouts and bypasses (which route exhaust around the muffler) are prohibited, as are tailpipe extensions that amplify noise. Maryland sets no fixed decibel limit (Md. Transp. § 22-402).

Official source: mgaleg.maryland.gov →

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