All N/A. TRD makes a supercharged kit for the 6cyl that the Toyota dealer will install for you (for a price of course) and it will be covered under manufacturer warranty. My kit for my 4cyl was aftermarket and installed it myself.
My favorite thing I loved to hear at the track or street races... "I just got beat.....by a TRUCK!?!?!?

I have heard that once by a slightly modded STI. It was a good day.