I don't really understand how this works. I am assuming that in long runner the air has to travel we'll say 12 inches to the engine. And in the short runner it has to travel 6 inches to get to the engine, thus doubling your intake. Is that right? I am not an engineer in anyway but why would it engage at 6000 rpm when red line is 7200 rpm? Wouldn't it be better to enable this system sooner for longer use? Like say 5000 or maybe 5500 rpms?