For those interested they may want to look at this.
Intake and Exhaust system tuning
Most of the time I have spent thinking about this is on my commute back and forth to work. This guy goes into more detail than I am can but it's similar conclusions. It's not back pressure, it's pulse timing. Thanks to those that have responded.
Also, just for laughs.
Exhaust Length,exhaust pipe,induction
My regards to all. Good luck to the racers.