What are the laws about vehicles with modified exhaust systems?

In Arizona, any modification to a vehicle’s exhaust system must comply with the state’s laws. All vehicles are required to have at least one functioning muffler, and exhaust systems must be properly attached and not extend beyond the rear of the vehicle. Additionally, motorcycles must have a working muffler at all times, and it must meet the standards prescribed by the Motor Vehicle Division of the Arizona Department of Transportation. In terms of noise, vehicles are not allowed to produce a sound of more than 92 decibels when measured from a distance of 50 feet. The noise must not be louder than the original manufacturer’s exhaust system when the vehicle is in motion. And exhaust systems must be in good working condition, with no gaping holes or sharp edges. It is important to note that many cities in Arizona have their own additional regulations in place, so it is important to be aware of any local laws when installing or modifying exhaust systems. Fines for violations of exhaust system regulations can reach up to $250. If a vehicle is found to be in violation, it may be impounded and the owner will need to pay fines and fees before it can be released.

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What are the laws about vehicles with modified exhaust systems?

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