There was a graphics company I seen in a magazine in which their logo looked very similar to the Gran Turismo logo, but it was some other graphics company bearing the initials GT. Bad news is, I don't know who. So, I'm sorry. And as far as "stickers add HP" and the "...he's just ricing out his car...," let's not go that way. I mean, he likes the GT series, so however he chooses to do it, even if he touches vinyl graphics, let him. The other day, I seen a Civic hatchback with rather ugly stickers on his ride, but I think if STi wants to do so, take advice from trEVO and Jalpa.
And if you have any further questions that I might be able to answer, STi, go ahead. Have a great weekend.