i should have 500 at the wheels on my truck or so i would expect at least, doing a 12.7@108 mph qaurter mile on my draggy on 35s and a heavy truck backs the power up, im running a mpt e50 tune and intake for that run, i am also heavier though than a stock raptor with heavier icon coilovers, leaf set for the rear, ten ply 35s over the factory 34.4 or 34.6 all seasons that it came with, and also the alcon bigger rotor brake kit that is pretty damn heavy so its losing power over the stock setup but i am able to beat most of the cars on the street that are much lighter than i am and the people that get rides from me say that it is very fast for a truck and never expected it to pull so good. im happy with the results , i am changing my high pressure fuel pump next few days to be able to run straight e85 instead of mixing it all the time so i will have a bit more power from running straight e85 ethonal to. so i would def stick to mpt and get the prx tune that will make you satisfied.