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District of Columbia Exhaust & Muffler Laws (2026)

Info: You can't modify your exhaust in a way that pushes noise above the legal limits.

InfoVerified Jun 19, 2026

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You can't modify your exhaust in a way that pushes noise above the legal limits. D.C. sets decibel caps for vehicles in use in a table — for example, 88 decibels measured at 50 feet (20 DCMR §§ 2811-2812).

Official source: dcrules.elaws.us →

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