judd.mcclure
SDD Junior Member
Stay away from SCT, the tunes for the 6.4 are not very good. The shifting is terrible and power isnt that great. Look into Spartan Diesel, i am running a 275 hp tune from them and avg around 22 mpg hand calc'd. Shifts are amazing, and i would never look back to any other tuner. until SCT releases some custom tuning stay away! There are SCT's people are trying to give away to switch to SPARTAN