Well, here are my personnal results with CAI and stock air box. Ran car at BSD test and tune this past sat. Weather was nice and track conditions were good. Ran first pass with K&N CAI and did 13.47 @ 102. Took car back to pits, swapped CAI for stock box and K&N panel filter. Went back and car ran 13.32@103. I couldn't believe it, but there it was, ran another run and ran 13.39, also realized I still have TRAC Control still on. Car had LMS Stage4+ in when I did those runs. I've been reading the posts about this debate and wanted to see for myself, and wife said wow too.