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I asked for and got the stage 2 tune from AA. At that time, they were not aware that AA had a stage 2 tune available for the N52, but they called AA and got the tune for me. TMS charged me $399 for the stage 2 tune (same price as the stage 1). TMS plugged in the other mods into the tune - the AFE stage 2 si intake and the BMW performance exhaust. I now have the exhaust on the car and it sounds great. With all 3 mods combined, there is a noticeable difference in power from the stock.
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