# Wehrli 01-04 Chevrolet 6.6L LB7 Duramax S400 Twin Turbo Kit (No Turbo) - WCFab Grey

2001-2004 LB7 Duramax S400/Stock Compound Turbo Kit.1000 RWHP capable depending upon turbo and fuel system modifications. Recommended for daily driver work trucks and tow rigs looking for increased horsepower, better fuel mileage, and superior EGT control with stock-like turbo spool characteristics. ??Recommended Combinations:??S475 / Stock IHI Turbo - Up to 750 RWHP with Supporting Modifications - Best Turbo Spool, performs well on stock fuel setups. WCFab 750 Built Allison transmission recommended.??S480 / Stock IHI Turbo - 800+ RWHP Capable with Supporting Modifications - Better top end performance that sacrifices a bit of spool on the low end compared to an S475/stock setup.WCFab 750+ Built Allison transmission recommended.??S480 / 64mm Drop In Turbo - 900+ RWHP Capable with Supporting Modifications - Improved top end power with moderate spool characteristics.WCFab 750+ Built Allison transmission recommended.??

-   Coolant Overflow Tank with Hoses, Fittings, & Low Coolant Sensor
-   Silicone Boots, T-Bolt Clamps, V-Band Clamps, Heat Wrap & Clamps
-   Atmoshpere Turbo Pedestal with Built in Oil Return Fitting
-   5" Intake, Dry Air Filter with Outerwears Pre-Filter Cover
-   Stainless steel oil feed and drain lines with fittings
-   3.5" Cold Side Charge Pipe, 3.5" Turbo Inlet Horn
-   3" One Piece Y-bridge with HD Bead roll end
-   4" Turbo Down Pipe, Ceramic Coated
-   Durable Custom Powder Coat Finish
-   3" cold side intercooler pipe
-   Made in USA

This Part Fits:

Year

Make

Model

Submodel

2001-2004

Chevrolet

Silverado 2500 HD

Base

2001-2004

Chevrolet

Silverado 2500 HD

LS

2001-2004

Chevrolet

Silverado 2500 HD

LT

2004

Chevrolet

Silverado 2500 HD

WT

2001-2004

Chevrolet

Silverado 3500

Base

2001-2004

Chevrolet

Silverado 3500

LS

2001-2004

Chevrolet

Silverado 3500

LT

2004

Chevrolet

Silverado 3500

WT

2002-2004

GMC

Sierra 2500 HD

Base

2001-2002

GMC

Sierra 2500 HD

SL

2001-2004

GMC

Sierra 2500 HD

SLE

2001-2004

GMC

Sierra 2500 HD

SLT

2003-2004

GMC

Sierra 2500 HD

WT

2002-2004

GMC

Sierra 3500

Base

2001-2002

GMC

Sierra 3500

SL

2001-2004

GMC

Sierra 3500

SLE

2001-2004

GMC

Sierra 3500

SLT

2004

GMC

Sierra 3500

WT

## Details

- **Price:** 4922.29 CAD
- **Vendor:** Wehrli
- **Type:** Turbo Kits

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 4922.29 CAD | In stock |

## Images

- Photo - Primary
- User 1
- User 2
- User 1
- User 3
- Logo Image

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/wehrli-01-04-chevrolet-6-6l-lb7-duramax-s400-twin-turbo-kit-no-turbo-wcfab-grey)
> Updated: 2026-07-07