It’s 505HP at the crank. You said it now makes 530HP at the wheels and it’s only 25HP more. 505 crank to 530HP at the wheels is a lot more then 25HP increase
Stock zo6 cars make 440 to 455 rwhp stock. So thats big uptick. Some of my new bmw cars say brake hp, but my m5 said 617 at motor it put down 648..so they lied. Thats why it runs 10.89 quarter-mile stock. But vettes usually right on numbers.
Could it come with the stock exhaust if you need it to pass the emission inspection ? Or would it pass the way it is? Does it still have catalytic converter’s?