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Massachusetts Exhaust & Muffler Laws (2026)
Info: Your vehicle needs a muffler in good working order that prevents excessive noise.
InfoVerified Jun 19, 2026
Your vehicle needs a muffler in good working order that prevents excessive noise. Cutouts, bypasses (which route exhaust around the muffler), removed baffles, and noise-amplifying exhaust are banned. Massachusetts sets no fixed decibel limit (M.G.L. c.90 § 16).
Official source: malegislature.gov →
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