HCC §24-109
Muffler required and what counts as too much noise
Read the official text at hawaiicounty.gov ↗You must have a working muffler on your car at all times when driving on public roads. The muffler must be big enough to stop loud noise and bad smoke. Too much noise means noise louder than what a good muffler would normally allow.
everyone
The ordinance, as written (Hawaiʻi County) — Muffler required; excessive or unusual noise defined
A copy, taken August 21, 2026. The version published by Hawaiʻi County is the one that governs, and it may have changed since. Check it before relying on anything here.
(a) No person shall operate a motor vehicle on a public highway or street unless the motor vehicle is equipped, at all times, with a muffler or mufflers in constant operation and of such length and size or of sufficient capacity for the motor and exhaust system to prevent the escape of excessive or annoying fumes or smoke, and excessive or unusual noise. (b) Excessive or unusual noise as used in this division means noise in excess of the usual noise which would necessarily result from the operation of a motor when reduced to the minimum by a muffler. VEHICLES AND TRAFFIC § 24-110
Published by the County of Hawaiʻi Office of the County Clerk.
LawTrove is not legal advice. The summary above is a computer-generated restatement — the authoritative text is the official version linked above.