Also, if something goes wrong with your car under warranty, the dealer needs to prove that your aftermarket part did the damage. [/B][/QUOTE
In theory that is correct, in reality depending on the problem, the dealership, etc. it could come down to who has the most time and money to dispute the decision, you or Ford.
Just remember, when you mod your car you could be left holding the bag if you have a problem, there are no guarantees.
You see what you want to see and you hear what you want to hear.........