I have a 99 f-350... how much stock horsepower does it have? I installed a sniper 120 horsepower chip and a 25 horsepower afe intake and need a guess on about how much horsepower my truck is pushing

250 HP only because of the intake. If you believed changing an electronic component would gain 120 HP, then you were foolish. The original engine design was only for 235 HP.