If it's louder than stock, you can get a ticket. Personally, if it drowns out my tunes with my window up, I'll stop you. I tell you what though, it's great to back up speeding tickets. I've had a large number of cases where I was able to add the fact that due to the illegal muffler I could hear the engine open up which was consistant to the acceleration shown by the radar.
Pittsburgh Pirates- 1st place NL Central 7/15/11
They've got us surrounded? Good. Now we can fire in any direction, those bastards wont get away this time
An amateur will train until they get it right. A professional will train until they can't get it wrong.