Here are the questions I have.
I already have the X4 tuner that I used on my Mustang.
Can I use this same tuner device for my F-150?
Will the X4 tuner hold tunes for both the F-150 and the Mustang? I don't want to lose my factory baseline tune from the mustang.
I am looking for a 89 performance type tune for the F-150.
2015 Roush RS1 Premium w PP