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The BorgWarner AirWerks SX S400 T4 turbine housing is a twin-scroll housing specified with a 1.25 A/R and 83/74mm twin-scroll inlet, configured to mate SX S400 turbine geometry with a T4 exhaust flange. It directs exhaust pulses into the turbine to tune spool and flow for forced-induction setups, providing a direct replacement housing option when switching between SX S400 internals and T4 outlets.
BorgWarner Turbine Housing SX S400 T4 A/R 1.25 83/74mm Twin Scroll
