Product Description
BorgWarner 177104 S400 Exhaust Housing — 83mm, T4, 1.10 A/R
The BorgWarner 177104 is a genuine AirWerks S400 turbine/exhaust housing designed for 83 mm turbine wheels with a T4 twin-scroll inlet and 1.10 A/R—an ideal choice when you want the flow of an S400 with the fitment flexibility of a T4 footprint. It’s a proven upgrade for fresh builds, T6-to-T4 conversions, and replacing cracked or fatigue-worn housings.
Key Features
- T4 twin-scroll inlet for broad manifold compatibility
- 1.10 A/R sizing balances spool and top-end flow on S400 builds
- Marmon V-band outlet for secure, leak-resistant connection
- OEM BorgWarner durability for high heat cycles
Fitment & Use Cases
Fits BorgWarner S400/SX frames using an 83 mm turbine wheel. Popular for single S400 setups targeting strong mid-to-top-end power and for atmospheric chargers in compound builds. Verify wheel size (83 mm), inlet flange (T4 divided), and outlet style before ordering.
Cross-Reference & Alternatives (BorgWarner only)
- BORGWARNER 177105 — S400 83 mm, T4, 1.25 A/R
- BORGWARNER 177103 — S400 83 mm, T4, 1.00 A/R
- BORGWARNER 177102 — S400 83 mm, T4, 0.90 A/R
- BORGWARNER 176811 — S400 83 mm, T6, 1.10 A/R
FAQ
What S400 turbos does 177104 fit?Any BorgWarner S400/SX frame using an 83 mm turbine wheel, T4 divided inlet, and matching V-band outlet. Always measure your turbine wheel and confirm flange styles before purchase.
Why choose a T4 1.10 A/R over T6?
T4 improves manifold compatibility and can help spool versus many T6 housings, while 1.10 A/R keeps backpressure in check for strong top-end on 83 mm S400 builds.
Does the housing include clamps or hardware?
No—this is the housing only. Order any required studs, gaskets, or V-band hardware separately.
Is this a good option for compound setups?
Yes. Many compound kits use a T4 S400 atmospheric for packaging ease and balanced spool vs. flow.
Specifications for BORG WARNER 177104
| Attribute | Value |
|---|---|
| Turbo Series | AirWerks S400 / S400SX3 |
| Part Number | 177104 |
| A/R | 1.10 |
| Inlet Flange | T4 twin-scroll (divided) |
| Outlet | Marmon V-band (approx. 4.62") |
| Turbine Wheel Fitment | 83 mm |
| GTIN | 0840232706789 |
| UPC | 840232706789 |
| Cross Reference | 177105 (T4 1.25 A/R), 177103 (T4 1.00 A/R), 177102 (T4 0.90 A/R), 176811 (T6 1.10 A/R) |
| E-Codes | Not specified by manufacturer |
| Shipping Info | Free Shipping; typical carton ~11" x 11" x 11" |
| Prop 65 | WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov |
Note: This is the housing only; clamps, studs, and gaskets sold separately.
