Sooooo I know this is late as hell......... but Firestone here in clarksville does not have an alignment rack capable of tuning Subaru's. Due to the stock negative camber and crap they will mess up your tires!
My husband bought new falken tires that didn't make it to a year old and half of the warranty because of their alignment. They tried to get us to buy thier bullcrap lifetime alignment crap so they can keep trying to fix it. I made them buy me new tires (cause I don't mess around) and I took it to wyatt johnson to have chris primm their head mechanic do it and fixed the problem.
However I have purchased tires from firestone and love the tires I have on my sti but I will never have them do an alignment!