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Idaho Exhaust & Muffler Laws (2026)

Info: Muffler in good order required; cutouts/bypasses & noise mods banned; 'excessive noise' = over 92 dB(A) at 20 ft — Idaho Code §§49-937, 49-106.

InfoVerified Jun 19, 2026

Muffler in good order required; cutouts/bypasses & noise mods banned; 'excessive noise' = over 92 dB(A) at 20 ft — Idaho Code §§49-937, 49-106.

Official source: legislature.idaho.gov →

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