BorgWarner Cummins S400 Turbocharger

The BorgWarner S400 turbocharger features a 76mm compressor wheel and a 83mm turbine wheel, a common setup for those looking to significantly increase airflow for their Cummins engine. This larger wheel size is key to its ability to move more air, which is essential for making more power. It's built with a durable cast iron turbine housing and a robust aluminum compressor cover, designed to handle the higher temperatures and pressures associated with increased boost levels.

This turbocharger is a popular choice for Cummins owners who are rebuilding their engine's top end or looking to upgrade from a smaller factory turbo. The S400 is known for its strong construction and its ability to provide a noticeable improvement in performance, especially when paired with appropriate fueling and exhaust upgrades. While it's a direct replacement for some applications, it's important to note that modifications might be needed for optimal integration, depending on your specific engine setup and desired power output. The internal wastegate is adjustable, allowing for fine-tuning of boost pressure to match your engine's requirements and your performance goals.

When installing the BorgWarner S400, ensure all oil and coolant lines are clean and properly routed to prevent contamination or leaks. It's also recommended to check and potentially upgrade your exhaust system to better handle the increased exhaust flow from the larger turbine. This turbocharger is not CARB approved and cannot be shipped to California.