← Hawaii driving laws›Exhaust & Muffler

Hawaii Exhaust & Muffler Laws (2026)

Info: Cars: no muffler noticeably louder than factory; motorcycle/moped need muffler, no cutout/bypass (no fixed dB) — HRS §§291-24.5, 291-24.

InfoVerified Jun 19, 2026

Cars: no muffler noticeably louder than factory; motorcycle/moped need muffler, no cutout/bypass (no fixed dB) — HRS §§291-24.5, 291-24.

Official source: capitol.hawaii.gov →

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

Don't get caught off guardGet a push the moment Hawaii law changes — or when you cross into a state where it's different. Free.Get the free app

LawLert is an independent app, not affiliated with any government — informational only, not legal advice. Verify with a licensed attorney in your jurisdiction.