I dont know where you live but most states do not allow any tampering with stock cats (unless they are damages or need replacement) so either way it will not be street legal. I got the offroad x-pipe and i loooove the sound, i have been told that it sounds just like the bullitt from steve mcqueens movie... ill try and get some sound clips up. But its not hard to switch out the midpipes if thats the problem. You can do it yourself in about 30 minutes or pay any garage about 30 bucks to do it, takes them about 15 minutes or so.