Just make sure when you buy an exhaust, buy a good branded one, all the shit ones (front pipe especially) tend to fit really badly or not at all
also this was the catback I ran, sounded really nice and not to loud
http://www.ebay.com.au/itm/Apexi-N1-Evolution-Exhaust-for-EVO-7-8-CT9A-4G63-/380458896342?pt=AU_Car_Parts_Accessories&hash=item58951e0bd6&_uhb=1#ht_842wt_1397