I had my 04 2.6 puller on a mustaing dyno last spring. Two diffrent ones one at St. Joe Diesel and one in Fosterburg Illinois at a dyno day my truck made 618 hp with a crappy tune with a ssr in St.Joe and 2 weaks later at the other one it only made 570 something... it made power to 3900-4000 rpm with that ssr tune. it also did not brake 1000 torque either. Im in the works of putting a 06 ecm and harness on it for efi live. For those of you with 03-05 trucks i talked to the guys with efi live at the pri show in orlando and they wont even start to work on software for our trucks till this time next year and that was a maybe. if i cant get the injectors to work with my efi tune i would be looking for ideas to make big power with tntr and what ever i would have to stack with it.