I don't think anyone is pissed... I'm certainly not.
Normally you have to find your own tubing, lowes, home despot, auto zone can help there...
you can connect it anywhere you want really. just as long as it's before the turbocharger and after the MAF sensor. So what, like anywhere in that 9" of piping.
The worry is not in the restriction from the cylinder head to the compressor wheel. There is supposed to be pressure buildup and therefore a restriction in that area. That's where the turbine wheel is gaining energy to give to the impeller wheel.
Take for instance a jet engine. It's pretty much just a big turbo charger. ~75% of the entire energy package produced by combustion is used by turbine wheels to sustain the compression of incoming air. That's a LOT of energy used.
In a car there will be energy loss (therefore a restriction) at the turbine wheel. It happens, nothing you can do about it. I don't even think people measure this amount... What can be done is make sure the energy loss is at the face of the turbine wheel and not in the manifold... get it extrude honed!
(
http://www.extrudehone.com/auto-oem.html)
After the turbo though, ideally, there should be no restriction. So to answer the question, yes, a 6+" exhaust will make more power, but at what point does the god awful droning become more of a nuisance than the 4 hp it creates over a 3" exhaust?
Personally I would look for ways to be more efficient just after the turbo and before the exhaust system. To me that means a nice downpipe that bolts to the factory exhaust.
I'd wager a guess that a good downpipe (from the turbo housing to the exhaust system) will make more power and keep noise under wraps better than the stock downpipe and 2324" exhaust piping.
/rant
