VTT - N54 Aluminum Turbo OutletLooking to get the most efficient turbocharger operation out of your N54 powered BMW? The best way to do this is to remove all restrictions from the inlet and charge the tract. The factory charge pipe has a very small 1 opening and a poorly designed Y section that couples the two banks into one before entering the intercooler. This VTT N54 Aluminum outlet gets rid of those restrictions and provides a full 1. 5 from the turbochargers to a smooth Y