There is a law against this sort of stuff. I can't remember it offhand, but i know people on here do.
Basically it says that aftermarket intake and exhaust cannot void a warranty. It also goes on to say that whatever has been modified/added to the stock vehicle, must be proven to be the cause of the damage.
I certainly hope that she did not pay for anything and if she did, I hope the tech get's ripped a new one, run up the flagpole by his whity tighties and then fired.