Genuine BorgWarner S400SX4 75mm Turbocharger

The Genuine BorgWarner S400SX4 Turbocharger (171702) is built for serious diesel performance, delivering exceptional airflow, durability, and efficiency for high-horsepower street, towing, competition, and custom engine applications. Featuring a 75mm Extended Tip Technology (ETT) compressor wheel, a 96mm turbine wheel, and a 1.32 A/R twin-scroll turbine housing, this turbocharger offers outstanding performance across a wide operating range.

Designed around BorgWarner's proven AirWerks platform, the S400SX4 utilizes twin hydrodynamic journal bearings, an advanced SX4 compressor wheel, and anti-surge compressor cover technology to improve airflow, compressor efficiency, and boost response while maintaining exceptional reliability. Whether you're building a high-performance street truck, dedicated tow rig, drag truck, or sled puller, the S400SX4 is engineered to handle demanding horsepower levels with confidence.

Features

• Genuine BorgWarner AirWerks S400SX4 turbocharger
• 75mm Extended Tip Technology (ETT) compressor wheel
• 96mm turbine wheel
• 1.32 A/R twin-scroll turbine housing
• Twin hydrodynamic journal bearing design
• SX4 compressor wheel for increased airflow and efficiency
• Compressor cover with anti-surge recirculation grooves
• Adjustable compressor and turbine housing orientation
• Half Marmon turbine outlet
• Built for high-horsepower diesel performance applications

Specifications

• Compressor Wheel Inducer: 75 mm
• Compressor Wheel Exducer: 100 mm (3.94")
• Turbine Wheel Inducer: 96 mm
• Turbine Wheel Exducer: 88 mm (3.47")
• Turbine Housing: Twin Scroll
• Turbine Housing A/R: 1.32
• Turbine Outlet: Half Marmon
• Original Turbine Housing: BorgWarner 171698

Applications

• High-performance diesel street trucks
• Heavy-duty towing applications
• Competition and drag racing trucks
• Sled pulling
• Custom diesel engine builds

BorgWarner Part Number: 171702

Fitment Note: This turbocharger is intended for custom performance applications and is not a direct replacement for a specific OEM vehicle. Compatibility depends on your engine combination, exhaust manifold, and installation requirements. The standard configuration includes BorgWarner turbine housing 171698. If you require a different turbine housing or need assistance selecting the correct S400SX4 configuration, contact Industrial Injection before ordering.