Product Description
BorgWarner 177275 S300SX3 Turbocharger S366/74 0.91 A/R T4 Housing
The BorgWarner 177275 S300SX3 Turbocharger S366/74 0.91 A/R T4 Housing is a genuine AirWerks performance turbocharger designed for street performance, drag racing, sled pulling, towing applications, and compound turbocharger systems. Featuring a 66mm extended-tip compressor wheel, a 74mm turbine wheel, and a 0.91 A/R divided T4 turbine housing, the 177275 delivers exceptional spool-up, strong mid-range power, and reliable top-end performance for diesel enthusiasts seeking a versatile S300-series turbocharger.
Built on BorgWarner's proven AirWerks S300SX3 platform, the 177275 is a popular choice for high-performance Cummins, Duramax, and Power Stroke builds. Whether used as a responsive single turbocharger or paired in a compound turbo setup, the S366 platform provides excellent drivability, airflow efficiency, and long-term durability thanks to its twin hydrodynamic journal bearing design and advanced compressor wheel technology.
Features
- Genuine BorgWarner AirWerks S300SX3 turbocharger
- S366 extended-tip compressor wheel design
- 66mm compressor inducer
- 74mm turbine wheel
- 0.91 A/R divided T4 turbine housing
- Twin hydrodynamic journal bearing system
- Oil-cooled center section
- Extended-tip compressor technology for improved airflow
- Excellent spool-up and street performance characteristics
- Ideal for towing, performance, and competition applications
- Popular choice for compound turbocharger systems
- Built for durability under demanding diesel operating conditions
Fitment
- Universal diesel performance applications
- 5.9L Cummins performance and towing builds
- 6.7L Cummins street and competition applications
- 6.6L Duramax performance builds
- 6.0L Power Stroke performance applications
- 6.4L Power Stroke custom turbo systems
- 6.7L Power Stroke performance builds
- Street and strip diesel applications
- Compound turbocharger systems
- Custom fabricated diesel performance projects
Note: This turbocharger utilizes a divided T4 turbine inlet and is intended for universal performance applications. Custom fabrication, charge piping, oil feed and drain lines, tuning, fueling upgrades, exhaust modifications, and supporting hardware may be required depending on the application.
What's Included
- BorgWarner 177275 S300SX3 Turbocharger
- 0.91 A/R Divided T4 Turbine Housing
- Compressor Housing
- Center Housing Rotating Assembly (CHRA)
- Factory Installed Journal Bearing System
Specifications
- Manufacturer: BorgWarner
- Part Number: 177275
- Turbocharger Series: AirWerks S300SX3
- Compressor Wheel: S366 Extended-Tip Design
- Compressor Inducer Diameter: 66mm
- Turbine Wheel Diameter: 74mm
- Turbine Housing: Divided T4
- A/R Ratio: 0.91
- Bearing System: Twin Hydrodynamic Journal Bearings
- Cooling Type: Oil-Cooled
- Compressor Technology: Extended-Tip Aerodynamics
- Housing Orientation: Adjustable
- Application: Universal Diesel Performance
- Primary Use: Single Turbo or Compound Turbo Systems
- Engine Compatibility: Cummins, Duramax, and Power Stroke Performance Builds
Cross Reference Numbers
177275, S366, S366/74, AirWerks S300SX3, BorgWarner S366, S300SX3 Turbocharger, BorgWarner 66mm Turbo, BorgWarner T4 Turbocharger
FAQ
What horsepower can the BorgWarner 177275 support?
The S366 platform is commonly used in performance diesel applications capable of supporting substantial horsepower while maintaining excellent street manners and responsiveness. Actual horsepower capability depends on engine configuration, fueling, tuning, and supporting modifications.
Is the BorgWarner 177275 a good towing turbo?
Yes. The S366 is popular among diesel enthusiasts looking for a balance of towing performance, street drivability, and increased horsepower potential when properly matched to the engine combination.
Can the 177275 be used in a compound turbo setup?
Yes. The BorgWarner S366 platform is frequently used in compound turbocharger systems where strong airflow and durability are required.
Does this turbo use a divided T4 housing?
Yes. The 177275 features a divided T4 turbine housing with a 0.91 A/R ratio for improved exhaust flow and turbocharger response.
Does the BorgWarner 177275 use ball bearings?
No. This turbocharger utilizes BorgWarner's proven twin hydrodynamic journal bearing design, known for durability and long service life.
What supporting modifications are recommended?
Recommended supporting modifications may include upgraded injectors, custom tuning, intercooler upgrades, high-flow exhaust components, charge piping improvements, and proper fuel system upgrades.
