Just got back from the first towing trip with the Edge Juce. This is the way these trucks should be from the factory! Dropped EGTs,more power in the useable RPM range. Did I mention more power? The smoothness of it is stunning. The 1st tank is about 1mpg better (hand checked weighing about 19,500#) that is the main reason for buying the box. I will be keepingtabs on MPG as that is #1 on the list I was after. So far I am VERY IMPRESSED!! Oo.