Correction on the pipe thing.
You can put on ANY aftermarket exhaust, however, by law, it cannot be louder (db) than the stock pipe.
Oh, and BS on the 30+ over impound comment. I've had 30 over, and all i had was a court date. Dennis Lopez got me out of points and a huge fine.
Good luck buddy. You're lucky they didnt take your bike away on the spot.