Yes, absolutely. Google "manifold runner length tuning." It works the same for intake and exhaust manifolds, although the calculations are...
Glad you figured things out! What was the problem, this 'peek behind the curtain'? --------- "vehicle is not stock compression. its 10.6:1...
Wow-you do have a serious problem. According to your E.T. and the curb weight of your truck you are only putting down about 110HP at the wheels....
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