Product Description
BorgWarner 179905 S300SX3 Exhaust Housing — 1.00 A/R, 74mm, T4
The genuine BorgWarner 179905 AirWerks S300SX3 turbine housing delivers a 1.00 A/R twin-scroll (divided) T4 inlet sized for the popular 80/74mm S300 turbine. It’s a proven way to reduce drive pressure and add top-end flow on S300 singles or S300/S400 compounds while keeping spool crisp on street/strip builds.
Why Buy from CPP Diesel
- Genuine BorgWarner AirWerks components with expert fitment guidance
- Fast shipping and careful packaging
- Diesel pros on call for S300/S400 sizing and combo recommendations
Fitment & Notes
- Turbo Series: BorgWarner AirWerks S300/S300SX3/SX-E (80/74mm turbine)
- Inlet: T4 divided (twin-scroll)
- Outlet: V-band (3.5" / 4.21" Marmon)
- A/R: 1.00
- Great match for 63–66mm S300 compressors on performance street/strip diesels
Cross-Reference / Alternatives (BorgWarner on CPP Only)
- BORGWARNER 177208 — S300SX3 0.91 A/R, 74mm, T4
- BORGWARNER 177209 — S300SX3 1.00 A/R, 68mm, T4
- BORGWARNER 177210 — S300SX3 0.88 A/R, 68mm, T4
- BORGWARNER 177211 — S300SX3 0.88 A/R, T4
Specifications for BORG WARNER 179905
| Part Number | 179905 |
| Turbo Series | AirWerks S300 / S300SX3 / SX-E (80/74mm turbine) |
| A/R & Inlet | 1.00 A/R, T4 divided (twin-scroll) |
| Outlet | V-band (approx. 3.5" / 4.21" Marmon) |
| UPC | 840232711035 |
| GTIN (UPC-A) | 00840232711035 |
| E-Codes | Not specified by manufacturer |
| Shipping Info | Ships ground; package weight ~12.4 lb; approx. 8.5" x 8.3" x 5.8" |
| Cross Reference | BW 177208 (.91 A/R 74mm T4), BW 177209 (1.00 A/R 68mm T4), BW 177210 (.88 A/R 68mm T4), BW 177211 (.88 A/R T4) |
| Prop 65 | WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov |
FAQ
Is 1.00 A/R right for my S300 build?A 1.00 A/R T4 twin-scroll is a great choice when you want stronger top-end power and lower drive pressure than .88/.91 options, while keeping street-friendly spool on 63–66mm S300 compressors.
What turbine wheel does 179905 fit?
It’s designed around the S300 80/74mm turbine (80mm inducer / 74mm exducer) used on many S300SX3/SX-E builds.
What outlet connection does this housing use?
V-band discharge (approx. 3.5" / 4.21" Marmon). Use the correct clamp/ring for your downpipe.
Do I need a divided (twin-scroll) manifold?
Yes—179905 is a divided T4 housing. Pair with a T4 twin-scroll manifold for proper pulse separation and best spool.
