Ok, so it was a Holden Monaro HSV, but it has 402 hp!!!
Ok, so it was in a video game. I've had Need For Speed Hot Pursuit 2 on Xbox since April and only played a few times, today I noticed a car I hadn't yet driven, and was like "Holy Crap, it'* a GTO!!" It held its own with ZO6'* and Cobra-R'*.