Product Description
BorgWarner 177281 S300SX3 Turbocharger — S366/74, .88 A/R, T4 Housing
BORGWARNER 177281 combines a 66mm S366 compressor with a .88 A/R T4 turbine housing for a responsive, durable AirWerks S300 package. It’s a proven performer for high-power singles or as the high-pressure charger in compound (S300/S400) setups.
Key Specifications
- Compressor (S366): 66mm inducer (2.60"), ~91.4mm exducer (3.60"); ported shroud cover with 4.0–5.0" style inlet and 3.0–4.21" style outlet (varies by cover)
- Turbine: .88 A/R T4 housing; ~80mm inducer / ~73mm exducer wheel (AirWerks S300SX3)
- Center section: twin hydrodynamic journal bearings; adjustable housing orientation
Universal performance turbo. Verify manifold flange (T4), downpipe connection, oil feed/return, and charge piping before purchase.
What’s Included
- BorgWarner 177281 S300SX3 turbocharger (S366/74, .88 A/R T4)
Recommended Add-Ons
- CPP -12AN Oil Drain Kit (S300/S400)
- Fleece FPE-34856 S300/S400 Turbo Stud Kit
- CPP S400 4.0" Compressor Discharge Elbow (for compound builds)
Popular Build Paths
Single T4 Upgrade: Requires a T4 manifold and compatible downpipe. Expect quicker response than many T6 S400 singles while supporting strong top-end power.
Compounds (S300/S400): Use 177281 as the high-pressure unit over an S400 atmospheric for fast spool + big airflow. We can spec the gate, piping, and manifold to your goals.
Shop Turbo Sections by Vehicle
Dodge/Ram Cummins
- CUMMINS MAIN HUB (Home tab)
- 1989–1993 5.9L (VE) — Turbocharger
- 1998.5–2002 5.9L (VP44) — Turbocharger
- 2003–2007 5.9L CR — Turbo/Supercharger
- 2007.5–2012 6.7L — Turbocharger
- 2013–2018 6.7L — Turbocharger
- 2019–2024 6.7L — Turbos & Accessories
Ford Powerstroke
GM Duramax
FAQ
Is the 177281 a direct bolt-on?
No. It’s a T4 universal turbo. You will need a T4 manifold, compatible downpipe/outlet, and appropriate oil feed/return and charge piping.
Street-friendly as a single?
Yes for well-matched fueling and goals—spool is quicker than many T6 S400 singles and supports strong mid-to-top power. For tow-heavy, quick-spool needs, consider smaller S300 options or compounds.
What are the outlet/inlet sizes?
Typical S300SX3 covers offer a large 4.0–5.0" air inlet and 3.0–4.21" charge outlet. Verify cover style before ordering.
Do I need an oil restrictor?
Generally no for journal-bearing AirWerks. Use clean feed and a free-draining -10AN to -12AN return. Follow best-practice oiling and prime the turbo before first start.
Will CPP help with compound parts?
Absolutely—contact us and we’ll spec the matching S400, gate, manifold, and piping for your power and use-case.
Why Buy BorgWarner Turbos from CPP Diesel
- Real fitment guidance for Cummins, Powerstroke & Duramax
- Fast shipping and careful packaging
- From stock replacements to fully custom compound systems
- Phone & chat support from diesel pros
