The air box on cars and some of the bikes he is talking about perform two functions. 10, to seal out the hot air in the engine bay and 2) draw/duct cold air from outside the vehicle. Cooler air is more dense than hot air. The air box on the Bonnie is not a form-follows-function approach. As it was said- the stock box is there because that is where they had space to put it. Functionally, it's junk- too, ugly to even be a planter pot.