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 go-to AirWerks S300 for street/strip builds and compound setups: 66 mm compressor inducer with extended-tip technology, .91 A/R T4 divided turbine housing, and a 90° compressor outlet for tidy charge-pipe routing. Durable twin hydrodynamic journal bearings keep it reliable under big boost.

BorgWarner S300SX3 S366 turbocharger 177284, AirWerks 66/74 .91 A/R T4 divided, 90 degree outlet, journal bearing, diesel performance turbo, compound friendly, CPP Diesel

Fitment & Notes

• Frame: AirWerks S300SX3 (S366/74)
• Turbine inlet: T4 divided (twin-scroll)
• Turbine outlet: V-band “Marmon” discharge (approx. 4.21")
• Compressor outlet: 90-degree cover
• Center section: Journal bearing, oil-cooled (no water)
• Typical power range: ~320–800 HP (combo-dependent)
• Universal performance turbo: requires custom oil/air piping, manifold (T4), downpipe, and tuning. Verify clearances and flange/clamp sizes before purchase.

Cross-Reference / Alternatives (BorgWarner on CPPDiesel.com)

• BorgWarner 177283 – S300SX3 S363/68, .88 A/R, T4
• BorgWarner 177280 – S300SX3 S360/68, .88 A/R, T4 (open)
• BorgWarner 177272 – S300SX3 S360/68, .91 A/R, T4

Specifications for BORG WARNER 177284

FAQ

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

No. This is a universal performance turbo with a T4 divided inlet and a V-band (~4.21") turbine outlet. Adapters, manifold, downpipe, oil feed/return, and intercooler piping are typically required.

Is the center section water-cooled?

No. AirWerks S300SX3 units like the 177284 are oil-cooled journal-bearing turbos (no water ports).

What’s the typical horsepower range?

With the right fueling, air system, and tuning, builders commonly use this S366 for about 320–800 HP setups. Results depend on the total combination.

Good single or better in compounds?

It can do both. Many use the 177284 as a responsive single or as the atmospheric unit in an S300/S400 compound system. Match turbine A/R and fueling to your goals.