I second you sentiments. The passenger side was pretty tough to align and has shifted on my car too. I'm taking to a muffler shop to adjust it. There is simply not enough room under the car using jack stands to adjust the exhaust properly.The only issue I had was a pre and post install one. The passenger side section is in two pieces which was a real pain to align and keep straight during the install process. Afterwards the system has shifted and is challenging to get it realigned, especially if you do not have real access to a lift.
I would suggest finding someone who can get the car in the are (more than a couple of feet since the stock exhaust is wedged in there pretty good and was a challenge to do on the garage floor using a traditional jack and jack stands.
Having said all that, I love it!! The performance is a nice addition plus the throaty-ness of the sounds is fabulous. I will say that it took a few days to get used to how loud the system, but that was short lived.
You don't have to cut the stock exhaust off. It's held onto the car with two metal clamps and 4? rubber hangers. It can easily be reinstalled if needed.I don't want to change the subject, but I have a small question about the AWE exhaust, and maybe down pipes. Anyways, I am wondering if after you install the AWE exhaust and downpipes, can the OEM exhaust be easily re-installed, and if not, how about without the downpipes? The reason that I am asking is because I probobly will lease the S5, and that in the other car I was considering, which was the BMW 335, I heard that if you wanted to upgrade the exhaust that you actually had to cut the OEM exhaust, and I just wanted to make sure that it wasn't so on the S5. Thanks.