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Iowa Exhaust & Muffler Laws (2026)

Info: Muffler in good working order required to prevent excessive/unusual noise; muffler cutouts/bypasses prohibited (no fixed dB) — Iowa Code §321.436.

InfoVerified Jun 19, 2026

Muffler in good working order required to prevent excessive/unusual noise; muffler cutouts/bypasses prohibited (no fixed dB) — Iowa Code §321.436.

Official source: legis.iowa.gov →

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