I find that interesting... I'll put my biased on their sound aside and talk flow. If you know what a boundary lair of air is you know that a 2" tube does not have a "working area" of 2", its less. That said that is a smooth tube, now remove that nice smooth tube for a perforated one.
Chambered or open headers...
i'll throw my car up, super 44 flow with a single 3" axle dump. Not stock obviously.
https://www.youtube.com/watch?v=cJ92UCIjtfc