http://www.xoutpost.com/bmw-sav-foru...eo-inside.html

Sound clip link in post #1.

If you going for the sound.. The stock 4.6/4.8is mufflers are not good for your 4.4i.I have heard both on 4.6 and 4.8is mufflers on 4.4i the sound is not that good and lound like on mine 3.0i.