Product Description
BorgWarner 178855 S400SX Turbocharger — S467/83, 1.10 A/R, T4 Twin-Scroll
BORGWARNER 178855 is a high-flow S400 (S467) built on AirWerks journal-bearing architecture with a 1.10 A/R T4 twin-scroll turbine housing. It’s a proven choice for serious single-turbo street/strip builds and as the atmospheric charger in S300/S400 compounds.
Key Specifications
- Compressor (S467): 67.7mm inducer (Comp O.D. 3.60"/91mm)
- Turbine: 83.5mm wheel O.D., 74.3mm exducer, 1.10 A/R T4 twin-scroll housing
- Center section: twin hydrodynamic journal bearings; adjustable compressor & turbine housing orientation
- Use case: ~400–1300 HP builds (fueling & setup dependent)
Verify manifold flange, downpipe, oil feed/return, and charge piping before purchase.
What’s Included
- BorgWarner 178855 S400SX turbocharger (S467/83, 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 T4 twin-scroll manifold & matching downpipe. Street-able with proper fueling; strong top-end for tow/compuse.
S300/S400 Compounds: Run 178855 as the low-pressure charger with an S300 high-pressure unit for quick spool and high mass flow.
Shop Turbo Sections by Vehicle
Dodge/Ram Cummins
- CUMMINS MAIN HUB (Home tab)
- 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
Will the 178855 bolt to my factory manifold?
No. The 178855 uses a T4 twin-scroll inlet. Most factory light-duty setups are T3 or single-scroll. A matching T4 twin-scroll manifold, downpipe, and proper piping are required.
Is this good as a single for daily driving?
With adequate fueling and proper tuning, many builders daily an S467. Spool is later than an S300 but street-able; shines from mid-range to top-end.
Key wheel sizes?
Compressor: 67.7mm inducer (3.60" OD). Turbine: 83.5mm OD, 74.3mm exducer. A/R: 1.10 T4 twin-scroll.
Do I need an oil restrictor?
Journal-bearing S400s typically do not run a restrictor. Ensure clean, properly sized feed and a free-draining -10AN to -12AN return. Monitor oil pressure and follow best practices.
Can CPP help me pick an S300 for compounds?
Yes—contact us. We’ll spec the high-pressure charger, gates, manifold, and piping for your power goals and altitude.
Why Buy BorgWarner Turbos from CPP Diesel
- Platform-specific guidance for Cummins, Powerstroke & Duramax
- Fast shipping & careful packaging
- From stock replacement to full compound systems
- Phone & chat support from diesel pros
