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Oklahoma Exhaust & Muffler Laws (2026)

Info: Muffler/noise-suppressing system required; cutout/bypass and exhaust mods louder than OEM prohibited (no fixed dB) — 47 O.S. §12-402.

InfoVerified Jun 19, 2026

Muffler/noise-suppressing system required; cutout/bypass and exhaust mods louder than OEM prohibited (no fixed dB) — 47 O.S. §12-402.

Official source: oscn.net →

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