I'm hoping someone can satisfy the engineer in me for why the cold side piping is larger diameter than the hot side. Putting on my thermodynamics hat, colder air is more dense, and thus needs less volume to maintain the same pressure. Seems that larger cold side piping would just result in a larger pressure drop, thus resulting in the classic decreased throttle response... Am I missing something? If the cold side was a smaller diameter pipe, it would also resolve the tight fit with the stock battery.