Unless you are very familiar with these vehicles the Best way is to have it checked out at a an Indie Shop, pay now ( small ) or pay later ( Big )

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2001 740i sport, Dinan upgrades, Bilstein's & H&R 2's , Zimmerman vented rotors, Akebono pads, HID fogs, BSW speakers and subwolfer, MKIV nav, Alpina Lip, OEM clear lights, 3m carbon fiber interior wood delete, 20" BBS, Fast enough for me