Product Description
Take your 2001-2004 LB7 Duramax to the next level with the WEHRLI CUSTOM FAB WCF100489 S400 SINGLE TURBO INSTALL KIT. Engineered for serious horsepower applications, this kit allows Duramax owners to convert their factory turbo system to a large frame BorgWarner S400 turbocharger (turbo sold separately) for dramatically increased airflow and power potential.
Developed by Wehrli Custom Fabrication, this kit includes premium fabricated components designed to support high boost pressures and large turbochargers. The system features a high-flow fabricated intake, upgraded intercooler piping, billet Y-bridge intake system, stainless oil lines, and a heavy-duty T6 turbo pedestal designed specifically for S400 frame turbo installations on the LB7 Duramax platform.
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Key Features
- Designed for BorgWarner S400 frame turbochargers
- Heavy-duty T6 turbo pedestal mounting system
- High-flow fabricated aluminum intake system
- Large diameter 3" aluminum intercooler piping
- Billet high-flow Y-bridge intake upgrade
- Stainless steel braided oil feed and drain lines
- Supports high horsepower Duramax performance builds
- Designed specifically for 2001-2004 LB7 Duramax engines
Fitment
- 2001 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LB7
- 2002 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LB7
- 2003 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LB7
- 2004 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LB7
- 2001-2004 GMC Sierra 2500HD / 3500HD 6.6L Duramax LB7
Installation Note: A forward-facing thermostat housing and supporting fuel system upgrades are recommended when installing large frame turbochargers like the S400 on LB7 Duramax engines.
Frequently Asked Questions
Does this kit include the turbocharger?
No. The Wehrli WCF100489 kit is designed to install an S400 frame turbocharger but the turbo itself must be purchased separately.
What horsepower levels can an S400 turbo support?
Depending on turbo size and supporting modifications, S400 turbo setups on Duramax engines commonly support 700-900+ horsepower builds.
Is tuning required when installing this turbo kit?
Yes. Custom EFI Live or similar Duramax tuning is required to properly calibrate the engine for larger turbochargers.
Will this kit work with stock injectors?
The kit can be installed with stock injectors, but upgraded injectors and fuel system components are recommended to fully utilize the airflow of an S400 turbo.
Is this turbo kit emissions compliant?
This kit is intended for off-road or competition vehicles and may not comply with emissions regulations in certain areas.
Specifications for WEHRLI CUSTOM FAB WCF100489
| Specification | Details |
|---|---|
| Brand | Wehrli Custom Fabrication |
| Part Number | WCF100489 |
| UPC | Not Listed by Manufacturer |
| GTIN | Not Listed |
| Shipping Weight | Approximately 65 lbs |
| Package Dimensions | 36 x 24 x 12 inches |
| Shipping Method | UPS / FedEx Ground |
| Prop 65 Warning | This product may contain chemicals known to the State of California to cause cancer or reproductive harm. For more information visit https://www.P65Warnings.ca.gov |
