Shentar
Well-Known Member
Single vs dual exhaust make no real difference. Its all down to diameters. I read "Maximum Boost" by Corky Bell, and it stated something like: a 3" single exchaust will flow the same as a 2.25" dual. I could be off by the diameter relationship. Basically, a single exchaust of X diameter will flow enough air to allow for N hp.. and a dual exhaust of Y, where Y < X, will flow enough for the same N hp. Its been a while so I don't remember the exact numbers. Only the basic ideas.Only one exhaust for 8 cyl?