Police in the US can just give people a faulty equipment ticket based on their perception of it being too loud or visually modified.
But you are not likely to see this enforced outside of rich quiet neighborhoods where police don't have anything better to attend to. Culturally, sentiment in the US does not want the law coming down hard on drivers and their vehicles. For instance, most US states do not even require vehicles to be safety inspected. And in urban areas the police have worse infractions to be going after.
But you are not likely to see this enforced outside of rich quiet neighborhoods where police don't have anything better to attend to. Culturally, sentiment in the US does not want the law coming down hard on drivers and their vehicles. For instance, most US states do not even require vehicles to be safety inspected. And in urban areas the police have worse infractions to be going after.