Fits for original BorgWarner AirWerks S400SX4 Turbo BorgWarner AirWerks S400SX S400SX3 turbine housing - 177104 T4 Twin Scroll - 1.10 A/R - 83mm turbine wheel Genuine BorgWarner AirWerks turbine housing You receive a single genuine turbine housing for a BorgWarner AirWerks turbocharger, this let you choose which A/R ratio orientation of the flange and flange type fits best to your application. Fits the subsequent turbochargers: S400SX (BorgWarner 178855) S400SX3 (BorgWarner 177248, 177101) For turbine wheels: 83mm (exakter Wert ist 83,47mm) A/R ratio: 1.10 Header flange: T4 divided / twinscroll Different A/R ratio? With this turbine housing you can fit your AirWerks turbocharger with a different A/R ratio. If you purchase an AirWerks turbocharger and wish to have a different A/R turbine housing, you have to order the corresponding turbine housing in addition. Notice: Mounting kit for turbine housing is sold separately!