Just got back from having the cat-back installed, and there were no problems with the installation. the cat-back sounds great, even through it is only with stock y-pipe, getting a cattman y-pipe soon, then this cat-back should sound even better. Just love the sound right when you turn the car on. Greg over at custommaxima.com took a couple before and after pics which should be on his site soon, hopefully the sound file will come out.