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      01-03-2013, 01:00 PM   #9
Wrngway's Avatar
Drives: '11 328i Sedan A6
Join Date: Jul 2011
Location: D.C. Metro

Posts: 412
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I have an N51 with the AA stage 2 tune. I can clearly feel a boost in acceration at part throttle at around 3,000 and 4,200 rpm. Those are approximate and it's more pronounced when the engine is warming up. At full throuttle I think both flaps are open.
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