Loud vehicles and modified exhausts are covered by Pennsylvania's Vehicle Code, which applies countywide in York County. Every motor vehicle must have a working muffler with no cutout or bypass, and must not exceed the sound levels set by state regulation.
Vehicle noise is a statewide matter, not a county ordinance. Under 75 Pa.C.S. §4523, every motor vehicle operated on a highway must not exceed the sound level prescribed by department regulation, and must be equipped with a muffler in good working order with no cutout, bypass, or similar device. Related equipment rules bar modifying an exhaust to amplify noise. State and local police in York County enforce these rules through traffic stops. This is separate from municipal residential-noise ordinances, which may address idling or stationary vehicle noise.
A summary traffic offense under the Vehicle Code; fines plus costs, and the vehicle may fail state safety inspection until the exhaust is corrected.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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See how York County's vehicle noise rules stack up against other locations.
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