S300SX This Borg Warner Airwerks Turbocharger features twin hydrodynamic journal bearings and adjustable turbine housing and compressor orientation. It also has recirculation grooves in the compressor cover and extended tip technology in the compressor wheel. It uses a twin scroll variety and T4 turbine inlet style. The outer diameter of the compressor wheel is 3.6 inches, and the inducer diameter is 2.6 inches. The turbine's area-to-radius ratio is 0.91.