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How about ESS? or BPM? or Dinan? therr are alot of good companies out there and to limit yourself to just a couple options will only cost you more. I have and sell the ESS flash tune and it has been proven (dozens of times) to be a very reliable and smooth tune. I know a lot of ///M Flight members who use the BPM tune, with zero issues. Since all of the flash tunes net about the same increase in power, why limit yourself?
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2014 M5 6MT  |