BorgWarner Turbine Housing SX S400 T4 A/R 1.10 83/74mm Twin Scroll

If you're looking to upgrade or replace the turbine housing on your BorgWarner S400 turbocharger, this T4 flanged housing is a solid option. It's built to handle increased exhaust flow, which is key for making more power. This housing is specifically designed for the S400 frame turbo and features a 1.10 A/R ratio, meaning it has a larger internal volume to help exhaust gases exit the turbine wheel more freely.

The 83/74mm turbine wheel specification indicates the size of the wheel this housing is designed to work with, and the twin scroll design helps improve throttle response and spool time by separating the exhaust pulses from each cylinder bank. This can lead to a more efficient burn and a broader powerband. BorgWarner is a well-known name in forced induction, and this housing is a well-built component designed to withstand the high temperatures and pressures found in performance applications.

Keep in mind that this part is not CARB approved and cannot be shipped to California. It's a direct replacement or upgrade for compatible S400 turbos, so ensure your existing turbocharger uses a T4 inlet flange and the specified turbine wheel size.