[Joe71Nova]

Originally Posted by aaron_c

Interesting...I still don't believe it, but they obviously made the claim. That gain is probably on a fully built race engine, running stock exhaust manifolds and switching to their headers or something like that. I believe they may have made SOME vehicle lose 1 second on 0-60 time, but not a stock Silverado.

I think the test was on a stock motor, even though changing it from a bult motor and still getting a gain? Sounds worth it to me i'm looking at gettin some shortys in the near future.