Either of the tuners mentioned would be good. Paul Cato of maverick diesel is another.
HP tuners is the way to go hands down. If you want a screen like MM3 you can mount a laptop or tablet for fairly cheap on the dash for real time data logging.
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2003 QCSB cummins, DDP 12mm CP3, DDP SM 150% overs, a turbo, Firepunk diesel 48re
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