Just a note to anyone thinking of going for a cat-back exhaust. I went to my local Carline Muffler shop and had them put on a 2.75" cat back and a 2.5" Dynomax Ultraflo oval muffler all for about $425 (tax included). I went with the 2.75" because of the pipe being press bent instead of mandrel, so it flows just as good if not better then a 2.5" mandrel bent. Guy did a nice job of limiting bends and doing smooth bends. As for sound it is very similar to stock sound at lower speeds but more bass, when you get on the pedal it gets louder in the higher rpms but again more of a bass sound. Power comes on easier now and it is nice to have a more aggresive sound to go with it. Might be of some help to some people, I know trying to save enough to get a HKS or GReddy exhuast just wasn't going to happen.