Installed mine today, took about 2 hours rounded off the top side cat bolts but not too bad overall. Sound is surprisingly MUCH louder, a bit of rasp and some whooshing but overall i'm happy with the sound. The fumes i'm going to have to get used to, not sure if theres a coating on the pipes thats burning off or if its strictly the unfiltered exhaust. Hard to tell right now if its a noticeable power gain, need to get out and do some more driving and let the ECU supposedly adjust. Great bang for the buck upgrade for the price if your willing to deal with the toxic fumes!