I don't think MPT has a tune for the 6.2L at least not on there website.
My truck had a 5 star tune when I bought it used and did not have the tuner. It would not pass smog had some sensors shut off. I called 5 Star and their attitude was that's your problem and tough shit why are you wasting my time, no advice, no offer to sell me a new tuner nothing!! I would never give them a nickel of my money.
Just ordered a tune from JDM engineering, Great people to deal with easy to get a hold of and went out of there way to accommodate me.