I met a guy at a car show tonight with a twin turbocharged GTO that looks completely stock.....it even looks like the stcok air box was in place. WE had a very long chat, really nice guy, he has owner both a GN and a TTA in the past. He said the car has made 700hp to the wheels on the dyno and uses methanol injection. He is afraid to use anything but regular tires because he thinks the rear is a weak spot, but that from a 50 mph roll the car is really fast. It is a stick and he said he does have a problem keeping it spooled as he shifts through the gears. I have never been a big fan of the GTO and how it looks, but man, what a sleeper that thing is....I would never have suspected it was anything but stock, even with the hood open without looking REALLY closely.