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Oklahoma Exhaust & Muffler Laws (2026)

Info: Your vehicle needs a muffler or other noise-suppressing system.

InfoVerified Jun 19, 2026

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Your vehicle needs a muffler or other noise-suppressing system. A cutout or bypass (which routes exhaust around the muffler) is prohibited, and so is any exhaust change that's louder than the factory (OEM) setup. Oklahoma sets no fixed decibel limit (47 O.S. § 12-402).

Official source: oscn.net →

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