[TheSt|G]

Once again, you are reading too far into what I said. Never once did I say back pressure increased torque.

If pipe diameter was a problem with our exhaust, the R&D side of the aftermarket would be there to fix it. Instead the power in our exhaust track in found in the headers(by deleting primary cats and creating equal length piping), deleting secondary cats(for a much reduced power gain compared to primaries), and smoothing out the bends in the mid pipes(almost no power to be gained).

Any assumptions about other factory exhaust components are just that, assumptions. Attempting to use them or incorporate them by the average joe is just as likely to lose power as gain power.