Maybe, but who knows ... maybe there will be a 2017 LT7 powered Z28 with 600 hp out of a naturally aspirated 7L. If they only sell 1000 of them per year, the effect on CAFE will be next to nothing.
Originally Posted by 72MachOne99GT
Yes, it would certainly appear that way.
But also keep in mind you're not only limiting your 'class' to naturally aspirated, but also pony cars.
There are certainly more powerful pony cars, and more powerful N/A applications.. just when the two are teamed together you get *for now* the most powerful application....
Though, I would be inclined to guess some of the 64-70 era pony cars were RIGHT on the edge of a modern 500-550 hp rating...
A lot of the 'underated 500 hp' monsters from the late muscle car era would be rated at something like 400 hp today. SAE gross vs SAE net.