Wow you guys really need to learn the law. The law doesnt state that any aftermarket exhaust is illegal. You can have any exhaust on your car that doesnt affect emissions(still has a cat). The exhaust just has to be the factory "type" meaning that is must have a muffler if so equipped with one from the factory. But where they get you, is that according to the code the exhaust must not be louder than stock. So if you get a silencer than the aftermarket exhaust will be legal.

P.S. Dont ever listen to cops, that CAN and WILL lie to you about anything and everything.