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Based on some reading on E90, I think Dinan is the way I will go for mods. Their ecu upgrade, while not cheap, seems to give more power, better drivability, and sometimes better mileage and nicer exhaust note. Sounds pretty good...I would pay the extra $600 or whatever for even the 50% chance that Dinan would cover the whole car becuase the rest of the tuners, there is no chance.
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