Ive been reading the 7.3l forums for about 4 years now. This is the tuner everyone says to run. Ive been wanting to save up for it myself. All these years the saving in fuel would have paid for it already. My truck currently has a flash paq tuner that ive read is horrible.
Link has info on the different years of 7.3l. The price is set at a fixed number its 300 bucks.
https://gopowerhungry.com/hydra-chip/edit: woohoo just bought one!! No joke. Got it from Riffraff. I had bought an air filter from them and liked it.
https://www.riffraffdiesel.com/