Now that we know Jinx doesnt care about us hijacking, Ill let you know that Im cool with starting a thread on this subject when I do it. I have found a couple websites on it, but Im still a little leary and need to research more. One guy was flow testing as he went, and found lots of areas that he lost flow... His exhaust runners ended up only getting ported on the bottom left corner, because hogging them out to match the headers actually lost a good bit of flow. Turns out there is actually an area of vacuum in the bottom right corner of the exhuast runners on GT40P's???