All of the bolt-on exhausts for the celica are axle-back. As far as performance wise most of them(the good ones) are within a couple hp of eachother, so it doesnt really matter which one you get, as long as you dont get one of the worst ones. Buy one based on looks and sound, people get all heated over which ones are better and make more power, but they are literally arguing over 1 hp, something you wont even notice. Of course its different if you get a kazuma or a custom exhaust. Those will make more power but will also be louder and not street legal.