I’ll add another endorsement for 5 Star. I never had a tune on my 5.4 F-150, but I have had theirs on my 4.6 3V F-150, 5.0 F-150, and now my EB. A noticeable improvement in all of them. I started with an X3, then bought an X4. SCT seems to have Ford nailed, which is why I’ve stuck with them...