I think it was a GtsR or the other way around but it had the R....i went to go check it out and ask the old man questions bout. He bought it for 100,000 and he claims it has 600 Hp....i beleive him though. Its so BADASS. This dude must be loaded though cuz he has some old sweet looking convertible thing a Hot Rod and a old Rolz Roise(Spelling is horrible Sorry). But that Viper was awesome loud as hell 2.