Quote:
Originally Posted by Omega94
That 436 hp rating comes from the optional exhaust that you can get on the standard C6 Vette. It sounds rather tame during regular acceleration but under WOT the pressue makes butterfly plates flip and making the Vette sound more aggressive. Forgive me if you already knew that, I figured I'd just put that out there!
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I knew of the reason, not the details. Also, when I was looking up related infor for that post I discovered another reason why GM's engines are under rated, its because of the SAE test protocol. it generates numbers that are about 5% lower than other engine dynos. So that would put the 430 hp SAE up to that 450 mark. Without doing a single thing. Learn something new every day . . .