Where have you been living? I know tons of people this has happened to. There used to be a loophole in the state vehicle code stating that any exhaust that was modified from stock was not legal. This was changed by the state a few years ago, making exhausts that were over a 95 decibel level from a certain distance from the exhaust tip to be illegal. However, if the cop thinks your exhaust is too loud, he can ticket you for it still, but you can get it decibel tested and then fight it in court...or put on a stock exhaust, get it signed off, and put the other one back on.