All those graphs that you post showing the real world data rather than conjecture and urban ledgend lead me to my next foolish question. Any opinion or data on what effect on the torque curve of your test engine if an H crossover pipe or an X crossover pipe had been added to the 2 1/2 inch exhaust system with street mufflers on it.

  I am very curious to know if what I believe ( that an H pipe helps on the street) is a fact or not? Thanks in advance. Pete