Can you quote me the X4 and the 3. I read the X4 loads faster and offers some "gage" options. I've got a 2010 SCREW 5.4 3v which will have JBA shorty headers next week. Looking mainly for an increase in tow performance, any other tunes would be nice such as an economy (mpg) setting etc.
Would the X4 gage display allow me to monitor trans temp, engine temp etc?