What must mufflers do according to regulations?

Mufflers are a crucial part of a vehicle’s exhaust system, and their primary function is to minimize the noise produced by the engine. Regulations specify that mufflers must prevent loud or unusual noise to ensure that vehicles operate within acceptable sound levels and contribute to public peace and safety. Loud noises from a vehicle can be disruptive, potentially leading to complaints and enforcement actions. Therefore, adhering to noise regulations establishes a standard that supports community standards and enhances the driving experience for everyone. This focus on sound control is why the requirement for mufflers centers on limiting noise rather than aesthetics or arbitrary features like color.