Yes, capable, obviously wont do that on a stock engine.
Battery is a user choice really as you could fit a filter in the bay, but obvious detrimental effects are to be had.
Its really just a solution to the main problem that a stock type install has. Is there room for improvement, sure, of course........but then you get into the realm of 'really, how much do you want to pay'.
This setup is to provide 200+bhp performance without stripping the engine apart and retaining the stock ECU, which to us is the holy grail. Everything else just ends up running like a pile of crap in comparison terms.