[grocerygetter]

Vizard's article shed some cool math. At 630 whp (for rounding sake), I would be fine with a dual 2.8" exhaust by my math. 700whp puts that number to a dual 3". This is given that the collector diameters are proper also...kooks 4-1, pfadt, etc...all fine from what I can see...the 4-1 headers with a merge spike does look beneficial to low end torque band broadening...but that's another topic. Anyway...thanks for the article. I'm sticking with a dual 2.5" for now...it isn't that much of a restriction with no cats and such currently. Once the car gets methanol and 700whp, I'll take it to dual 3".