BorgWarner Turbine Housing SX S400 A/R 1.25

BorgWarner is well-known for its reliable forced induction components, and this SX turbine housing for the S400 turbocharger is no exception. This housing features an A/R ratio of 1.25, which is a key specification that influences how the turbocharger responds to engine load. A larger A/R like 1.25 generally helps the turbocharger move more air at higher engine speeds, which can be beneficial for applications focused on top-end power.

This well-built turbine housing is designed to be a direct replacement for your existing S400 unit, making installation straightforward if you're rebuilding or upgrading your turbo setup. The material and construction are typical of BorgWarner's commitment to durability in demanding applications. When selecting a turbine housing, the A/R ratio is crucial for matching the turbo's airflow characteristics to your engine's needs, and this 1.25 A/R is a popular choice for those looking to optimize for higher RPM performance.