Starting up my E60 BMW M5 with Eisenhaus Test Pipes (precat delete), X Pipe and GT Exhaust. This is a old video from back in the day and was filmed with a crappy camera. The camera could not capture the sound because it was so loud. It makes the car sound like a lawnmower and it doesn’t sound anything like that in person.
Here is a video my friend Brian Zuk Filmed when the car was in motion http://www.youtube.com/watch?v=YOJlDoXUsP4