you probably think your m5 is a racecar too then huh? that completely explains your logic.Choked? The air is supersonic...sweet lets shove that into our engines. Crazy ram air.
:nono: I disagree about the ribbing. While I cannot quantify it,...yet..., I would rather have smoothest ducting I can get. The engine is drawing in air like a vacuum and this air is moving quickly, thus you do as much as you can to not slow it down. The multiple bends is not helping the case as I agree, but you would be surprised what ribbing as apposed to bends does. Been there done that with actual racecars.