carringb wrote:
I've never heard of a single case of a dealer denying a claim on a tuned V10. Ditto EcoBoost F150 owners.
Also, I've never heard anybody's V10 being damaged by a 5-Star tune.
On F-150 Forums I've read of tuned engines being denied coverage. I'm sure both of us have never heard of many things that have happened.
In any event what matters is that Ford seems to be in a position to deny coverage to tuned engines. Knowing that, do what you want. But acknowledge you're possibly putting your warranty at risk.