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New tuning to be used with your existing MM3 or RaceMe Ultra,  HP numbers are based off your existing mods.    Single or Shift on the fly,  shift on the fly includes idle sounds such as 12 valve,  Lope, Hiss and Rumble where applicable.   You must send a copy of your stock file back, includes instructions 

MM3 or Raceme Ultra files only, 2010-2021 Cummins

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