Hey all been here a bit ,started reading just to get a better education on these awesome trucks . I have had a 99 cummins ,2005, and now a 2014 6.7 ! I was confused as to weather I should go new or not with the DEF additive etc but I caved when I saw the new ones . I ordered mine the way I wanted it . single rear wheel and all the stuff ! Now comes the long process of learning and understanding . So far this thing is blowing me away ! first road trip 19.4 MPG average ! at 74 mph on the high way ! I was shocked ! I don't know if there will be any legal mods to this truck ,but for now I just hope it works well with the new strangulation stuff . Anyone with sugestions or recommendations let em rip ! I plan on haveing this one a while !