i have an '07 ram, one ton dually, 5.9 ctd done a lot of power train upgrades and suspension upgrades for towing and hauling. i put a smarty jr. programmer on last year and i am happy as hell with this tuner. it's ranges are 40 hp, 70 hp and 105 hp. the median gave me nice power and lower egt's with about two mph gain, i use the 105 mostly because of my weight when towing and the locales that i am going to. with this matchup i get about the same mpg as stock but my foot is not pressed down as much with a full load. the egt's are my main concern and they are between one and two hundred degrees lower, just my two cents.