We had a new Stebro exhaust installed on my wife's 2003 Z4 3.0 yesterday, and it sounds great (http://www.youtube.com/watch?v=GyAbSgJ1_-w
). He did this for a reduced cost as he needed a sound clip.
When he found out that I had a 2008 M5, he offered me a FREE system, to get a video and sound clip.
I'm worried about the warranty in Canada. Have any Canadians checked to see whether it is affected? I've sent an email to BMW Canada, but they may take a few days to reply, and he would like the car immediately, as they have a few spare days to do the work.
They did a new X5, and it sounds MEAN!!! (http://www.youtube.com/watch?v=ZXfsnauaKwU&feature=related
I really like the fact that their systems have a LIFETIME warranty.