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Nobody can currently flash via ODBII. It's either a piggy back box (BMS) or have your ECUs removed/flashed/reinstalled.
The piggy back works well especially from a "bang for your buck" standpoint. The BMS will also control methanol if you go that route.
The safer and more efficient way would be to change fuel, timing, boost, all within the ECU of course.
Brian
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/// 2o13 m6 f13 . jb4 tuned . meth injected . msr intake . 21" adv1 wheels . eisenmann race w/ catless DPs . vorsteiner full aero . accuair e-level w/ bagged KW V3 struts . dinan sways . bel stir+ w/ alp jammer . jl audio subs
/// 2o13 x5m e70 . velos tuned . 22" adv1 wheels . dropped on kw variant3 coilovers . passport 9500ci radar & jammer. gets groceries fast
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