6.4l predator, extreme puck stack

[jpaddock]

has anyone stacked the predator and extreme puck? is it safe? and what kind of hp gains?

[joestroo]

I stacked the 2 for some time, my truck ran great!! I really didn't notice a mileage change. As far as power, i really noticed the power puck in the bottom end. I ran the 80hp tune, and had the puck at 50%, and it would break loose my 35' tires without loading up the turbo's at all, from a dead stop punch the gas and leave black marks!!! The puck alone really did do much, but staked it made a difference.