BORGWARNER 177284 S300SX3 TURBOCHARGER – S366/74, .91 A/R, T4 HOUSING

Product Description

BorgWarner 177284 S300SX3 Turbocharger S366/74 .91 A/R T4 Housing

The BorgWarner 177284 S300SX3 Turbocharger S366/74 .91 A/R T4 Housing is a genuine AirWerks performance turbocharger built for responsive street performance, street/strip diesel builds, sled pulling, drag racing, and compound turbo systems. Featuring a 66mm extended-tip compressor wheel, a 74mm turbine wheel, and a .91 A/R divided T4 turbine housing, the 177284 delivers excellent airflow, strong spool-up, and reliable power for high-performance Cummins, Duramax, and Power Stroke applications.

Built on BorgWarner's proven S300SX3 platform, this S366 turbocharger is a popular choice for builders who want a responsive single turbo or an efficient atmospheric charger in compound turbo setups. Its durable twin hydrodynamic journal bearing center section, oil-cooled design, 90-degree compressor outlet, and divided T4 housing make it a versatile option for custom diesel performance projects.

Features

• Genuine BorgWarner AirWerks S300SX3 turbocharger
• S366 extended-tip compressor wheel design
• 66mm compressor inducer
• 74mm turbine wheel
• .91 A/R divided T4 turbine housing
• Twin hydrodynamic journal bearing system
• Oil-cooled center section with no water ports
• 90-degree compressor outlet for easier charge-pipe routing
• V-band Marmon-style turbine discharge
• Excellent choice for street/strip diesel performance builds
• Compound-friendly turbocharger platform
• Built for reliable performance under high boost conditions

Fitment

• Universal diesel performance applications
• 5.9L Cummins street and competition builds
• 6.7L Cummins performance builds
• 6.6L Duramax custom turbo applications
• 6.0L Power Stroke performance builds
• 6.4L Power Stroke racing applications
• 6.7L Power Stroke custom turbo systems
• Street/strip single turbo setups
• Compound turbocharger systems
• Custom fabricated diesel performance projects

Note: This is a universal performance turbocharger with a divided T4 inlet and V-band Marmon-style turbine outlet. Custom fabrication, manifold compatibility verification, downpipe changes, oil feed and drain lines, intercooler piping, tuning, fueling upgrades, and supporting modifications may be required depending on the application.

What's Included

• BorgWarner 177284 S300SX3 Turbocharger
• .91 A/R Divided T4 Turbine Housing
• 90-Degree Compressor Housing
• Center Housing Rotating Assembly (CHRA)
• Factory Installed Journal Bearing System

Specifications

• Manufacturer: BorgWarner
• Part Number: 177284
• Turbocharger Series: AirWerks S300SX3
• Compressor Wheel: S366 Extended-Tip Design
• Compressor Inducer Diameter: 66.0mm
• Compressor Exducer Diameter: Approximately 91.4mm
• Turbine Wheel: S300 74mm Turbine
• Turbine Inducer Diameter: Approximately 80mm
• Turbine Exducer Diameter: Approximately 73mm
• Turbine Housing: Divided T4
• A/R Ratio: .91
• Turbine Outlet: V-Band Marmon-Style Discharge, Approximately 4.21 Inch
• Compressor Outlet: 90-Degree Cover
• Bearing System: Twin Hydrodynamic Journal Bearings
• Cooling Type: Oil-Cooled, No Water Ports
• Typical Power Range: Approximately 320-800 HP Depending on Setup
• Application: Universal Diesel Performance
• Primary Use: Street/Strip Single Turbo or Compound Turbo Systems

Cross Reference Numbers

177284, S366, S366/74, S300SX3, AirWerks S300SX3, BorgWarner S366/74, S366 9180, 177283, 177280, 177272

FAQ

Will the BorgWarner 177284 bolt directly to my stock manifold and downpipe?

No. This is a universal performance turbocharger with a divided T4 inlet and a V-band Marmon-style turbine outlet. A compatible manifold, downpipe, oil feed and return lines, charge piping, and tuning are typically required.

Is the BorgWarner 177284 water-cooled?

No. AirWerks S300SX3 turbochargers like the 177284 use an oil-cooled journal bearing center section and do not have water ports.

What horsepower range is the BorgWarner 177284 commonly used for?

With the right fueling, airflow, intercooling, and tuning, builders commonly use this S366 turbocharger for approximately 320 to 800 horsepower setups. Actual results depend on the complete engine combination.

Is this turbo better as a single or in a compound setup?

The BorgWarner 177284 can be used successfully in both applications. It is commonly used as a responsive single turbocharger or as the atmospheric charger in compound turbo systems.

Does this turbo use a divided T4 housing?

Yes. The 177284 features a .91 A/R divided T4 turbine housing, also commonly referred to as a twin-scroll T4 housing.

What supporting modifications are recommended?

Recommended supporting modifications may include upgraded fuel delivery, custom tuning, intercooler upgrades, high-flow exhaust components, oil feed and drain lines, charge piping, and proper boost and EGT monitoring.