There was an article I think I read where Ford, upon seeing so many people keep asking whether tunes and other powertrain mods would void warranties and such, had made an unofficial decision to just save everybody the hassle of having to worry about warranty this and warranty that by keep warranties intact if only the benchmark would be hit where 50,000 different people start 50,000 different threads asking the same question in 50,000 different times.
I do believe this is only the 38,913 thread asking this question so I guess we're SOL on the warranty until another 11,087 threads.
And as much as we would like to give you a more definite and positive answer unfortunately the answer is still the same as the previous 38,912 times on something like 1000 different forums.
Unless you're talking about BAMA tuning your radio, then yes it will technically void everything that the tune touches or causes to turn or otherwise adds more stress to if they can prove caused abuse beyond what they designed the car for. They can void your warranty unless your cool with the dealer who may opt to help conceal the mods to Ford who...... [click here to read more on Google]
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