Just in case anyone missed it, BMW released a sound clip of the M performance 328i exhaust...
http://http://www.bmw.com/com/en/own...ies_sedan.html
Once you go to the link, click drivetrain, then click the exhaust pic in the top middle, below the picture of the exhaust you will see a 1/3, click the next button to hear a sound clip of the M performance exhaust (2/3), if you go to 3/3 you will hear a comparative clip of the 328i stock exhaust.
