Kings County's code has no vehicle-noise or muffler ordinance; on-road vehicle noise is governed by the California Vehicle Code, enforced by the Sheriff and CHP. Amplified sound broadcast from a vehicle does require a county permit under Chapter 8, Article II.
Engine, exhaust, and modified-muffler noise from vehicles on public roads in unincorporated Kings County is regulated almost entirely by state law rather than a county ordinance. The Kings County Code's vehicles-and-traffic chapter (Chapter 23) covers parking, speed, abandoned vehicles, and signage but contains no muffler or vehicle-noise section. California Vehicle Code Section 27150 requires every motor vehicle to have an adequate muffler in good working order and prohibits modified exhaust that amplifies or increases noise, and Section 27151 bars exhaust modifications that exceed legal noise limits; the Vehicle Code also sets maximum decibel levels by vehicle class. These statewide rules are enforced by the Kings County Sheriff's Office and the California Highway Patrol. Separately, the County does regulate amplified sound projected from a vehicle: Chapter 8, Article II requires a Board of Supervisors permit to operate a loudspeaker mounted on a vehicle over public roads or public places in the unincorporated county. So a loud aftermarket exhaust is a state Vehicle Code matter, while a vehicle blasting announcements or music through a PA implicates the county loudspeaker permit and the general noise-nuisance rule.
Excessive exhaust or muffler noise is cited under the California Vehicle Code (e.g., Sec. 27150/27151) by the Sheriff or CHP, often as a correctable 'fix-it' citation. Using a vehicle-mounted loudspeaker without a county permit violates Kings County Code Ch. 8, Art. II and is a misdemeanor under Sec. 1-8 (up to $1,000 and/or six months).
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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