The BorgWarner AirWerks turbine housing for SX S400 with A/R 1.00 is the exhaust-side housing specified for S400-series turbochargers. It provides the A/R 1.00 turbine geometry shown in the description and is intended for use with compatible AirWerks S400 components when assembling or modifying a turbocharger to the listed A/R ratio.
BorgWarner Turbine Housing SX S400 A/R 1.00