For Sale: AFE Cold Air Intake system for an E39 540i. Used but like new with all hardware, instructions, stickers, in original box. Clean and ready to be oiled. Includes maintenance kit (cleaner & oil). $200 plus shipping. Like this: http://www.turnermotorsport.com/html/detail.asp?PRODUCT_ID=54-10471
I might have been a year ago but I don't need any right now. Tahoe is at 6300 feet. As such the air is extremely dry with a lot of really fine dust. I've gotten lazy and have decided that it's easier to just replace the paper filter than clean and re-oil the AFE regularly.