super pack
just to give you the info on this also. the 550 hp kit is a massive improvment, the milleage has suffered though. i'm down to 18 - 23 mpg. the power range is from start to finish, it pulls hard through the whole rpm range. you have to get a clutch with it, ford racing says no but they are off their rocker!!!! the stock clutch won't hold up even on relaxed drivers. i went with an 04 cobra ford racing clutch, works great.
stock tires won't hold up either. 1st and 2nd tires spin, 3rd clutch spins, both put off large amounts of smoke!!! ford racing has the warrenties on their site, but you need to talk to your dealer who you deal with. they are all different, i found one dealer that wouldn't install my power upgrade pack, they said they had trouble with map sensors, and oil, and that ford wouldn't warrenty them. but others didn't have a problem with it. find one that will take care of you.
TO ALL IN THE SALT LAKE- OGDEN AREA: DON CAMBELL (SERVICE MANAGER) AT WESTLAND FORD IN OGDEN UTAH IS THE BEST I HAVE FOUND IN TWO STATES!!!
IF YOUR IN THAT AREA AND IN TROUBLE HE WILL TAKE GOOD CARE OF YOU.
HE ALSO OWNS A MUSTANG. 08 GT 500 SHELBY, AND HE LIKES CALIFORNIA SPECIALS TOO.!
hope i answered some of your questions