Product Description
BORG WARNER 176809 S400 TURBINE HOUSING — 83MM • .90 A/R • T6 DIVIDED
Build your S400 the right way with the genuine BorgWarner 176809 exhaust/turbine housing. Sized at .90 A/R for crisp response and strong flow on an 83mm turbine wheel, this T6 divided (twin-scroll) housing is a proven match for big single S400s or as the atmospheric charger in S300/S400 compound setups.
Highlights: 83mm turbine wheel fitment • .90 A/R twin-scroll volute • T6 divided inlet • half-Marmon ~5.75" outlet • cast-iron durability for high EGT and drive pressure control.
Fitment
- Turbo family: BorgWarner AirWerks S400 / S400SX / S400SX4
- Turbine wheel: 83mm
- A/R: 0.90
- Inlet flange: T6 divided (twin-scroll)
- Outlet: Half-Marmon ~5.75"
- Use case: Big single S400 or low-pressure (atmospheric) charger in S300/S400 compounds
Cross-Reference / Alternatives (BorgWarner on CPP Diesel)
- BORG WARNER 176810 — 83MM • 1.00 A/R • T6
- BORG WARNER 176812 — 83MM • 1.25 A/R • T6
- BORG WARNER 176811 — 83MM • 1.10 A/R • T6
- BORG WARNER 177102 — 83MM • 0.90 A/R • T4 (twin-scroll)
FAQ
Will this .90 A/R T6 housing fit my S400 with an 83mm turbine?
Yes. Part 176809 is engineered for S400 frame turbos using an 83mm turbine wheel and a T6 divided inlet.
What outlet style does 176809 use?
Half-Marmon (~5.75") outlet—common to many S400 housings and compatible with standard S400 downpipe flanges.
How does .90 A/R compare to 1.00 or 1.25 A/R?
Smaller A/R (like .90) generally offers quicker response at the expense of top-end flow. Larger A/R (1.00–1.25) supports higher peak power with later spool. Choose based on displacement, cam, gearing, and intended use.
Is this housing emissions compliant?
Motorsports/competition component. Not CARB-approved for highway use. Check local and state regulations.
Specifications for BORG WARNER 176809
| Attribute | Value |
|---|---|
| Turbo Series | AirWerks S400 / S400SX4 |
| A/R | 0.90 |
| Turbine Wheel | 83mm |
| Inlet / Outlet | T6 divided (twin-scroll) / Half-Marmon ~5.75" |
| UPC | 840232705799 |
| GTIN | 0840232705799 |
| Cross Reference | 176810 (1.00 A/R T6), 176811 (1.10 A/R T6), 176812 (1.25 A/R T6), 177102 (0.90 A/R T4) |
| E-Codes | Not specified by manufacturer |
| Shipping Info | Typical boxed weight ~20–21 lb; ships ground. Dimensions approx. 11.7" × 10.9" × 7.4". |
| Prop 65 | WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov |
