Like i said before have you ever felt your intake tubes or your air box do it one time and you will never call the duel tubes cold air intakes. Second they travel through restricted plastic air tubes in the grille to small air tubes up to the box through even smaller slits in the box to one opening. The AMG air box and the y port is about the only other option then this. HDDP has a twin system with a Y piece. I don't know just from putting it together and seeing everything as it came off there is no way that this is more restrictive. People are not feeling gains from the twin intakes off ebay because they are still going through the air box.