VTT - S55 M3/M4 Silicone Charge Pipes BundleLooking to get the most efficient turbocharger operation out of your S55 powered BMW? The best way to do this is to remove all restriction from the inlet, and charge tract. The factory charge pipes are poorly designed due to being completely flattened coming out of the turbos, before the intercooler. These VTT S55 silicone charge pipes get rid of those restrictions and provide a full 2 ID from the turbochargers into the intercooler, as well as not