I'm super disappointed. I was fully anticipating 450 hp. I know it's only another 15 hp, but at least with 450, its a stable mark in the muscle car run here. Look for chevy to add more hp. Ford will be at the bottom of the test reviews come 2015 comparisons. I may need to drive one to truly feel the difference in the entire package. My fear is a 2014 with a cold air and tune will out run it, so what's the point.