Depends what's done and Ford still has to prove the mods caused any issue when taken in. Fully modded my warranty was never voided even when the DS snapped ;-)
After owning and heavily modding an 11 v6 (down to swapping the internals in the mt82 and multiple gear changes) , ecoboost with Performance Package is all around better vehicle even compared to the year and a half I ran the 3.7 with 3.55 gears. I'm sure with just a tune and a couple of mods I...