What power did it blow up at? I honestly believe that stock blocks are more reliable than built ones if you're not pushing over 500~ish WTQ, especially the 2014+ motors.
I bet that your motor was either hurt already, or the tuner doesn't know what he's doing.
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Creator of the GTR TT Conversion Kit, NA Record Holder (401WHP)
Ecutek Master Tuner (VQ37, VR30, VR38, B58, S55, S58)
BTWTuning
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