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I also have a 2007 530 (XiT wagonm 6MT). I really like the change in my e93 N51 tune, but don' tplan to spend the same money on the already nicely tuned 255hp 530 (same as 330). Just not the potential for much improvement through computer alone. I would love to bring the 5 up to the 3's handling, but that is a whole different $$ range and would never really get there.
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'08 328i convert, '07 530Xit wagon - twins with 6MT's, Ty Silver/Black leather, sport pack, sport seats, 18's, cold pack, PDK, etc., but only e61 wagon has iDrive/Nav, and only e93 has custom tune and Eisenmann exhaust.
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