Yes, but if they go about it this way it is absolutely unenforceable as it is too vague. Also, there is no such thing as a "factory noise level setting". Someone can change legally their exhaust as long as the emissions are not modified and without violating the noise ordinance. They need to specify the actual decibel level that, if exceeded, results in the fine. Then they can write up all the idiots with the pineapple shooter exhausts and have the tickets stick.