It doesn't make sense to me why BAT would use a bellow hose for "smooth" intake air. Bellows are the last thing air needs. The air just burbles over them. They're just like the spoilers on the wings of aircraft in a sense. BAT should have gone with a more flexible vacuum hose instead of the stuff that comes off a pool pump. Anyway, in order for "ram air" to work the air must follow the shortest, most direct path from the air source to the manifold. If you throw all these twists, bends, bellows and filters in the way the air just stalls out, and doesn't allow anymore in until the little that is in the hose is accepted into the manifold. Sorry BAT, but you should have gone to aerodynamics class with me.
