Hi everyone. This is basically my first post here on this forum (aside from my wanted ad for this exhaust). I just picked up an 07 Alpine white M5 this past weekend and had the eisenmann race installed this morning. All I can say is...WOW!!! I have to admit I was a bit hesitant and nervous reading posts of people who had it installed for a week and then took it off because it was too loud. I am coming from an 06 E46 M3 with an E-Race and I must say the M5 certainly has much less cabin noise. It sounds great, feels more responsive, but really just has that great F1 tone that I really admire. For people who are on the fence or have a bit of anxiety, I strongly suggest pulling the trigger and going for it. You will not be dissapointed. I use this car as a daily driver, and will not hesitate one bit to have clients ride in my car. What an absolutely amazing vehicle! Thanks to everyone for all their knowledgeable insight on the issue. I know this post is pretty worthless without pics. I am having the car detailed tomorrow and will post a bunch right after that. stay tuned!!!!