Originally Posted by Vegas DSS GT
Shelley only works on their cars so the one post is correct back in the past they used to work on non Shelby cars..my buddy gave this car to his son he is the one that destroyed this motor first thing he was put 5.4 plugs in it which cross threaded the the heads in return drop metal shavings in the cylinder walls and if that wasn't bad enough he striped some bolts and decided to drill the bolt out and tap them while he had plugs out of the car there for metal shavings dropped into the cylinders and contaminate the motor. Who knows what else this kid has done but there is no way ford will warranty this it's his dumbass mistakes!! I'm just trying to help my buddy get his car back together he is a good guy.. his 23yr old kid 100% Dumbass..
Wut? Why would anyone even mess with a motor in a brand new car for something as simple as plugs unless they did an upgrade to the Fuel Induction system that necessitated it?
Regardless, no one will cover the car as a warranty.
Two options, take it somewhere and have them fix it back to stock or, time to pay for upgrades...heads are probably going to be expensive if you get upgraded ones. If you luck out, you may find some take-off OEM's from someone that did some serious upgrades to their own GT500 heads.