Hey all, Im new to Bimmers, and I have NO IDEA where to start lookin for aftermarket parts. I have a 2001 540 auto, and want to see some prices and parts for upgrades. Im mainly looking for engine mods, so if anyone can help me out I would REALLY appriciate it. Thanx.

http://www.bimmerforums.com/vendors.php?s=

depends on what you're looking for.