The BorgWarner AirWerks S400SX turbine housing is built with a T4 inlet and a V-band turbine flange (VTF) outlet in a 0.90 A/R for an 87mm turbine wheel. Cast iron construction stands up to high exhaust-gas temperatures, and the housing bolts to the S400 center section to complete the turbine side of the turbocharger.
| Series | S400SX |
| Turbine Wheel | 87mm |
| Turbine Inlet | T4 |
| Turbine Outlet | V-Band (VTF) |
| A/R | 0.90 |
| Design | Single-scroll, free-float |
| Material | Cast iron |
| Part Number | 178787 |
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