mate ford dont warrenty any thing as a stock item unless that actuall car came with that actuall part, i have a f6 i was going to put genuine ford racing gauges in i baught from ford but they said they would not warrent it or anything they could not even fit them for me if i wanted too, so i would imagine swapping a stock 6t cooler for a f6 cooler weould not be coverd, i live in brisbane and run the standard cooler at the moment and its fine if your worried id look at installing a water spray kit to your fmic (front mount intercooler)before swapping coolers tho i'd swap the pipe work under the hood around so the turbo is not sucking hot air from the other side of the engine aka do the battary to the passenger side and what not as thats prob going to cool your car down more then a bigger cool in stock form. but thats just me ask some of the x factor guys they are the guys to seek advice from.
mods to date: exhaust flash tune injectors and intank pump twin air filters a.r.e. custom cooler 100x 300x 600
stage 1 power to date: 500rwhp
fat pipes, power torque engines, tuffcarparts.com
CHOMP CHOMP ALL THEM IMPORTS FOR LUNCH