$550 for a MAP sensor and a canned tune or $650 for HPTuners MPVI Pro and the ability to custom tune the car for anything you want and data log and do real time tuning. Hell, if all you want is a tune, HPT's standard VCM Suite is only $500.
I am gonna call this a no brainer and once again suggest not wasting time or money with anything from GMPP or any of it's partner brands.
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