Product Description
BorgWarner 179174 S400SX Turbocharger — S475/87, 1.10 A/R, T4 Housing
BORGWARNER 179174 delivers serious airflow with a 74.6–75mm (S475) compressor and an 87mm turbine in a T4 twin-scroll 1.10 A/R housing (factory housing PN 178789). Built on the proven AirWerks S400 platform with twin journal bearings and extended-tip compressor wheel tech, it’s equally at home as a high-power single or the atmospheric charger in S300/S400 compounds.
Key Specifications
- Compressor (S475): ~75mm inducer, ~100mm exducer
- Turbine: 87mm wheel, 1.10 A/R T4 divided (twin-scroll) housing (PN 178789)
- Center Section: twin hydrodynamic journal bearings; adjustable compressor/turbine housing orientation
Verify manifold flange (T4), downpipe style, oil feed/drain, and charge piping prior to purchase.
What’s Included
- BorgWarner 179174 S400SX turbocharger (S475/87, 1.10 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
Popular Build Paths
Single T4 Upgrade: Requires a T4 divided manifold & matching downpipe. Spools later than many S300 options but offers strong top-end flow.
S300/S400 Compounds: Run 179174 as the low-pressure (atmospheric) charger with an S300 high-pressure for fast spool + big air. Ideal for towing/competition setups with proper fueling.
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 179174 a T6 turbo?
No. The factory configuration for 179174 uses a T4 divided 1.10 A/R housing (BorgWarner PN 178789). If you need T6, choose a different S400 configuration or swap housings accordingly.
What size is the compressor and turbine?
Approx. 75mm compressor inducer with ~100mm exducer; 87mm turbine wheel paired to the 1.10 A/R T4 housing.
Street-friendly single or better in compounds?
It can be street-driven with proper fueling and converter/gearing, but it shines as the low-pressure charger in compound S300/S400 setups.
Do I need an oil restrictor?
Journal-bearing S400s typically do not require a restrictor. Ensure a clean, correct oil feed and a free-draining -10AN to -12AN return.
Can CPP help with manifolds and piping?
Yes—contact us for the correct T4 divided manifold, downpipe, gates, and charge piping to match your goals.
Why Buy BorgWarner Turbos from CPP Diesel
- Platform-specific advice for Cummins, Powerstroke & Duramax
- Fast shipping with careful packaging
- From stock replacements to custom compound systems
- Phone & chat support from diesel pros
