Not Ranked
Yes, you're correct....
If you start at 500 fwhp and lose 20%, you've lost 100 and you're down to 400.
If you start with 700 and lose 20%, you've lost 140 and you're down to 560.
And I believe that if a certain size exhaust system is restrictive to a 500hp 400ci engine, it's going to be even more restrictive to a 700hp 500ci engine.
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