S400 171701 Turbocharger for Detroit Series 60 12.7L
The S400 (171701) is a BorgWarner turbocharger for the Detroit Diesel Series 60 12.7L engine at 450-475 HP. This is a non-wastegated turbo with a T6 turbine inlet, 1.32 A/R twin-scroll turbine housing, and V-band 4.21” compressor outlet. It replaces the OEM Garrett TMF5502 that was originally equipped on the Series 60, with an upgraded 71mm compressor wheel. BorgWarner part 171701, Detroit OEM 23518588. Our S400 ships new with all new components, dynamically balanced, with gaskets. We supply shops, fleets, and distributors.
Turbo Model
S400 / S400S061 (BorgWarner, non-wastegated, T6 twin-scroll)
OEM / Interchange Numbers
171701, 23518588, R23515635, R23515636, R23516431, 466713-0002, 466713-0003, 2585837C91
Application
Detroit Diesel Series 60 12.7L (450-475 HP), also CAT C12
Service & Support
- 1-Year Unlimited-Mileage Warranty
- US Stock, Fast Dispatch
- Bulk Orders Welcome
- White-Label Support
- Fully Certified
Your Source for Quality Diesel Engine Parts
FAQ
The S400 (171701) fits the Detroit Diesel Series 60 12.7L at 450-475 HP. It also fits some Caterpillar C12 applications. Detroit OEM numbers include 23518588, R23515635, R23515636, and R23516431.
The 171702 (S400/S475) is the performance variant with a larger compressor wheel for 475+ HP applications. The 171701 is the standard 450-475 HP replacement.
Yes. The S400 (171701) is a direct bolt-on replacement for the OEM Garrett TMF5502 originally equipped on the Series 60, with an upgraded BorgWarner 71mm compressor wheel.
Brand new, 100% new components, dynamically balanced. No core charge. One-year unlimited-mileage warranty.
Yes. US stock, volume pricing for shops, fleets, and distributors.
S400 for Detroit Series 60: The 450-475 HP Standard Turbo
The BorgWarner S400 (171701) is the go-to turbo for higher-HP Detroit Series 60 12.7L engines. It replaced the original Garrett TMF5502 and brought an upgraded 71mm compressor wheel for better airflow and durability. The S400 is also widely used in turbo conversion kits for the Detroit 14L and in other heavy-duty applications.
Detroit Series 60 turbo lineup
| Turbo | HP range | Key part # |
|---|---|---|
| K31 | 360-430 HP | 172253 / 172743 |
| S400 (this page) | 450-475 HP | 171701 |
| S400/S475 | 475+ HP (performance) | 171702 |
Check your engine HP rating and serial number to determine which turbo you need.
S400 specifications
- Turbine inlet: T6 flange, twin-scroll
- Turbine housing A/R: 1.32
- Turbine exhaust: 5.75”
- Compressor outlet: V-band 4.21”
- Compressor wheel inducer: 71mm
Common failure modes
- Bearing wear — shaft play at 300k-500k miles. Oil leaks, rising EGT.
- Turbine wheel erosion — long service hours at high EGT on the 12.7L.
- Oil seal failure — restricted drain or high crankcase pressure.
Installation
- Direct bolt-on T6 flange replacement. Ships with gaskets.
- Flush oil feed line. Replace oil drain gasket.
- Prime with clean oil, idle 3-5 minutes before loading.
See our quality process for details.
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