Exhaust:

Not sure if I need to change just the tips, the muffler, or the whole exhaust system to get the look of the 4.6 or 4.8. I really dont need the performance aspect, I just like the look.

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They make tips out there that you can just slip over your factory exhaust tips.

http://cgi.ebay.com/ebaymotors/00-06...QQcmdZViewItem

Here are those tips on a 3.0i.

http://www.xoutpost.com/x5-e53-forum/...more-pics.html