Why go with single exit instead of dual as it comes factory? I see a lot of manufacturers producing them, but are they really that much better? Or, that much worse...

I guess my opinion is it logically sounds like it would choke the car without adequate exhaust "airways". Seeing that Honda gave it two, it's my assumption two is what it needs to properly exit the exhaust gases.

Is the hosepipe analogy a good comparison? No nozzle, low flow rate. Nozzle, faster rate... Thus louder/different sound?

 

less restriction, less weight, more power

 

I would take this to the N/A aspirated forum. Basically like blix above me said, its less weight, less restriction with better/direct airflow to run with aftermarket parts.

 

Single will give you less restrictions, more power, less weight etc.
The car has a fake dual exhaust stock. If you put a single on a dual exhaust V8 car yeah you will choke it. Are car has 1 header. Dual is just for looks and sound.
Having said that I still like having a dual as I like how it looks better.

 

And dual sounds much richer.