HCC §24-110
Rules for vehicle exhaust systems
Read the official text at hawaiicounty.gov ↗You cannot drive a car on a public road unless its engine and exhaust system are set up to stop too much smoke or fumes and to stop unusually loud noise. This section only sets that basic rule.
everyone
The ordinance, as written (Hawaiʻi County) — Exhaust system requirements
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.
No person shall operate a motor vehicle on a public highway or street unless the motor and exhaust system of the motor vehicle is properly equipped and adjusted so as to prevent (a) the escape of excessive or annoying fumes or smoke, and (b) the emission of excessive or unusual noise.
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.