Product Description
BorgWarner 179174 S400SX Turbocharger S475/87 1.10 A/R T4 Housing
The BorgWarner 179174 S400SX Turbocharger S475/87 1.10 A/R T4 Housing is a proven AirWerks performance turbocharger engineered for high-horsepower diesel applications, drag racing, sled pulling, street performance, and compound turbocharger systems. Featuring a 74.56mm S475 extended-tip compressor wheel, an 87mm turbine wheel, and a 1.10 A/R twin-scroll T4 turbine housing, the 179174 delivers exceptional airflow, strong top-end performance, and reliable durability under demanding conditions.
Built on BorgWarner's legendary AirWerks S400 platform, the 179174 is commonly used as a powerful single turbocharger or as the atmospheric charger in compound turbo systems paired with an S300-series high-pressure turbo. Its durable journal bearing center section, surge-resistant compressor cover, and adjustable housing orientation make it a popular choice for serious Cummins, Duramax, and Power Stroke diesel performance builds.
Features
- Genuine BorgWarner AirWerks S400SX turbocharger
- S475 extended-tip compressor wheel design
- 74.56mm compressor inducer
- 87mm turbine wheel
- 1.10 A/R twin-scroll divided T4 turbine housing
- Twin hydrodynamic journal bearing system
- Ported-shroud compressor cover for surge resistance
- Adjustable compressor and turbine housing orientation
- Excellent for high-horsepower single turbo applications
- Ideal atmospheric turbocharger for compound systems
- Built for extreme diesel performance and reliability
Fitment
- Universal diesel performance applications
- 5.9L Cummins performance builds
- 6.7L Cummins competition builds
- 6.6L Duramax high-horsepower applications
- 6.0L Power Stroke performance builds
- 6.4L Power Stroke racing applications
- 6.7L Power Stroke custom turbo systems
- Single turbo performance setups
- Compound turbocharger systems
- Custom fabricated diesel performance projects
Note: This turbocharger utilizes a divided twin-scroll T4 inlet flange. Custom fabrication, manifold compatibility verification, charge piping, oil feed and drain lines, fueling upgrades, tuning, and supporting modifications may be required depending on the application.
What's Included
- BorgWarner 179174 S400SX Turbocharger
- 1.10 A/R Twin-Scroll T4 Turbine Housing
- Compressor Housing
- Center Housing Rotating Assembly (CHRA)
- Factory Installed Journal Bearing System
Specifications
- Manufacturer: BorgWarner
- Part Number: 179174
- Turbocharger Series: AirWerks S400SX
- Compressor Wheel: S475 Extended-Tip Design
- Compressor Inducer Diameter: 74.56mm
- Compressor Wheel Outside Diameter: 100.17mm (3.94 Inch)
- Turbine Wheel Diameter: 87.37mm
- Turbine Exducer Diameter: 81.74mm
- Turbine Housing: Twin-Scroll Divided T4
- A/R Ratio: 1.10
- Bearing System: Twin Hydrodynamic Journal Bearings
- Housing Orientation: Adjustable Compressor and Turbine Housings
- Compressor Cover: Ported-Shroud Anti-Surge Design
- Factory Turbine Housing Part Number: 178789
- Application: Universal Diesel Performance
- Primary Use: High-Horsepower Single Turbo or Compound Turbo Systems
Cross Reference Numbers
179174, 178789, 14009097001, 318396, 14007110000
FAQ
What horsepower can the BorgWarner 179174 support?
With proper fueling, airflow, intercooling, and tuning, the BorgWarner S475/87 platform is commonly used in high-performance diesel applications capable of supporting substantial horsepower levels in both single and compound turbo configurations.
Is the BorgWarner 179174 a good compound turbocharger?
Yes. The 179174 is extremely popular as the atmospheric, or low-pressure, turbocharger in S300/S400 compound turbo systems due to its excellent airflow and durability.
Does this turbo require a divided T4 manifold?
Yes. The 179174 utilizes a twin-scroll divided T4 turbine housing and should be paired with the appropriate divided T4 exhaust manifold for optimal performance.
Does the BorgWarner 179174 use ball bearings?
No. This turbocharger features BorgWarner's proven twin hydrodynamic journal bearing design for durability and long service life.
Can this turbo be used as a single turbocharger?
Yes. Many high-horsepower Cummins, Duramax, and Power Stroke builds successfully utilize the S475 as a standalone turbocharger when supported by proper fueling and engine modifications.
What supporting modifications are recommended?
For best results, supporting modifications may include upgraded injectors, fuel system improvements, intercooler upgrades, custom charge piping, exhaust modifications, tuning, and proper boost and drive pressure management.
