Have the same drive train and gears as you do in my 2015 250. I've added a flash tune and got little to no gains. From my reading tunes do little for naturally aspirated engines. Anything running a turbo can have boost increased to add power but only so much fuel can be added to a NA motor before its too rich and killing power. The best gains to NA are in changes are to shift points to hold the motor in the power band for longer.