What are the laws about vehicles with modified exhaust systems?

In Washington, vehicles that have modified exhaust systems are subject to both federal and state laws. According to the Clean Air Act, it is illegal to install on any motor vehicle any device that alters the original exhaust system installed by the manufacturer. Washington state law also states that any modifications made to the exhaust system must be done in accordance with the requirements of the Department of Ecology. In order to pass inspection, the exhaust system must comply with the requirements of the Washington State Department of Ecology. This includes installing a muffler and any other necessary equipment that allows the exhaust to meet the legal sound level requirements. Additionally, the exhaust must not emit any hazardous materials. If these requirements are not met, the vehicle may fail the emissions inspection and may be subject to additional fines or other legal action. It is also important to note that some modified exhaust systems may not be street legal and may only be used in off-road racing or other specific off-highway applications. It is important to note that these types of exhaust systems are subject to loud noise requirements, and if used on the street, may be subject to additional fines or other legal action. In conclusion, individuals who are considering installing a modified exhaust system on their vehicle must make sure to comply with all applicable laws and regulations, as well as properly inspect their vehicle to make sure it meets all necessary requirements. Failure to do so may result in additional fines or other legal action.

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What are the laws about vehicles with modified exhaust systems?

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