It's not the actual crush that reduces overall flow, it's the portion directly after the crush that flares back out to the original diameter that is the turbulent restriction. The low pressure void created by the expansion after the crush bends causes backflow, if only for an instant. It is possible for this design of exhaust to be better than the stock SVT system because of the differently designed split, but it would not outperform the same Cardoc type system with mandrel bends.
Richard, you have all of the numbers, formulas, and results, but you miss one very important thing to add... Exhaust gas isn't a constant. It's a series of pulses.
mmars, very impressive duals man!!!
I'll be doing something very similar!!!