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Wyoming Exhaust & Muffler Laws (2026)

Info: Your vehicle needs a muffler or other effective noise-suppressing system in good working order.

InfoVerified Jul 22, 2026

Your vehicle needs a muffler or other effective noise-suppressing system in good working order. A cut-out, bypass or similar device (which routes exhaust around the muffler) is prohibited. Wyoming sets no fixed decibel limit (Wyo. Stat. § 31-5-953).

Official source: wyoleg.gov →

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