Concerns installation, modification, and sale of certain mufflers and exhaust systems; requires inspection of mufflers and exhaust systems.

This bill (S 122) requires all motor vehicles in New Jersey to have mufflers and exhaust systems that do not amplify noise beyond the original factory level. It directly affects vehicle owners, auto repair shops, and mechanics who install or modify exhaust systems. The bill bans modifications that increase noise and adds noise inspections to standard vehicle safety checks during annual inspections. Violations carry fines up to $500, and the law applies to most registered vehicles except motorcycles, historic vehicles, and those over 8,500 pounds.