Actually, its illegal to modify your exhaust in ANY way from stock! That means any aftermarket muffler that may be louder or whatnot. Its been this way for a long time. Its also illegal to remover/ tamper with the cats.. Its a $3000/ PER OFFENCE to tamper with emisions equiptment. (2 cats gone, $6k and its a federal offence) They can also make you open your hood at ANY time to do a vehicle inspection. If they find out the smog equipt. isnt right or something that not legal, they can impound your ride..

Be thankful you only get a cheap fix-it ticket.