S400 Turbocharger (163259)BorgWarner's S400 series is the proven heavy haul, sled pull, and street strip turbo platform and this is the Wehrli spec drop in. Built on a T4 turbine flange, S400 chargers handle big airflow across 5. 9L 6. 7L Cummins, 6. 6L Duramax, and 6. 0L 6. 4L 6. 7L Powerstroke applications, whether running single or as the upper stage of a compound kit. Pick the wheel that matches your goal cast for value, forged milled (FMW) and SX E for higher RPM and