Ah you have missed recent developments -
I've got Garrett -5s on my car now.
Just to see, I purchased a set of Tomei dumps and to put them to the test.
I didnt make 1rwkw more than any other setup with stock R33/R34 dumps. No same day. Same dyno, same parts on motors built to the same spec - best i have which isn't too far off.
My power curve is identical to all the others. 3.5" exhaust, no cat, Racepace front pipes etc etc.
I wasted $600, just how it goes.
Actually no i lie - the exhaust note changed slightly. That's all I got from $600
There is only one flaw to the straw analogy. If the straw flows the amount of air - simply going bigger offers nothing.
Just because a setup dares to push the limits, and produces the results, people doubt.
Only human nature, i doubted too and hence i purchased dumps even against advice