BorgWarner AirWerks S400SX Turbo - 100/83 - 179171 BorgWarner AirWerks S400SX Turbo - 71mm 100/83 BW part number 179171 Genuine BorgWarner AirWerks turbocharger Note: Currently, some compressor housings come without a logo! This is not a difference in quality! All components come directly from BW USA from the factory. AirWerks turbochargers from BorgWarner Turbo Systems are dedicated aftermarket turbos for the performance sector. Proven line-produced parts (mostly from Schwitzer Turbo) are being combined to deliver high end tuning and motorsports performance while maintaining an ideal price/performance ratio. The S400SX Series has been developed exclusively with the American sports compact class in mind. These turbochargers are even more focused on motorsports in terms of performance and drivability. performance rating: 500 - 950 HP compressor housing: intake 140mm / pressure side 76mm compressor wheel: inducer 71,08mm / exducer 100,01mm turbine housing: 1.10 AR / header flange T4 Twinscroll (T4 divided) / turbine outlet BorgWarner V-Band turbine wheel: inducer 83mm (exakter Wert ist 83,47mm) / exducer 74,29mm / external wastegate - dual hydrodynamic journal bearing - extended tip technology - Twinscroll turbine housing - adjustable orientation of compressor housing and turbine housing - compressor housing with anti-surge ports (High-Flow) - compressor housing with optimized geometry Different A/R ratio? If you order an AirWerks turbocharger and wish to have a different AR you have to order the corresponding turbine housing separately.