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Nebraska Exhaust & Muffler Laws (2026)

Info: Your vehicle needs a muffler or other noise-suppressing system in good working order, cutouts and bypasses (which route exhaust around the muffler) are unlawful, and changes that increase noise are banned.

InfoVerified Jun 19, 2026

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Your vehicle needs a muffler or other noise-suppressing system in good working order, cutouts and bypasses (which route exhaust around the muffler) are unlawful, and changes that increase noise are banned. Nebraska sets no fixed decibel limit (Neb. Rev. Stat. § 60-6,286).

Official source: nebraskalegislature.gov →

General legal information, not legal advice — verify important decisions with a licensed attorney.

Exhaust & Muffler in states bordering Nebraska

The same rule in each neighboring state LawLert has verified, from that state’s own official source.

ColoradoInfo
Your vehicle needs an adequate muffler. A cutoff or bypass (which routes exhaust around the muffler) is prohibited, and so is any exhaust change that raises noise above the stock level. Colorado sets no fixed decibel limit for passenger cars (C.R.S. § 42-4-225).
Verified Jul 22, 2026 · Source: leg.colorado.gov · Full Colorado rule →
IowaInfo
Your vehicle needs a muffler in good working order so it doesn't make excessive or unusual noise, and muffler cutouts and bypasses (which route exhaust around the muffler) are prohibited. Iowa sets no fixed decibel limit (Iowa Code § 321.436).
Verified Jun 19, 2026 · Source: legis.iowa.gov · Full Iowa rule →
KansasInfo
Your vehicle needs a muffler or other effective noise-suppressing system in good order, and cutouts and bypasses (which route exhaust around the muffler) are prohibited, while excessive noise is barred. Kansas sets no fixed decibel limit (K.S.A. § 8-1739).
Verified Jun 19, 2026 · Source: kslegislature.gov · Full Kansas rule →
MissouriInfo
Your vehicle needs a properly attached muffler to quiet the exhaust, and muffler cutouts and excessive noise are barred — a violation is an infraction. Missouri sets no fixed decibel limit (Mo. Rev. Stat. § 307.170).
Verified Jun 19, 2026 · Source: revisor.mo.gov · Full Missouri rule →
South DakotaInfo
Your vehicle needs an exhaust system and muffler in good working order, the exhaust has to discharge to the rear or the side, and muffler cut-outs (which route exhaust around the muffler) are prohibited. South Dakota sets no fixed decibel limit (SDCL § 32-15-17).
Verified Jun 19, 2026 · Source: sdlegislature.gov · Full South Dakota rule →
WyomingInfo
Your vehicle needs a muffler or other effective noise-suppressing system in good working order, and 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).
Verified Jul 22, 2026 · Source: wyoleg.gov · Full Wyoming rule →

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