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2001-2004 LB7 Duramax S400/Stock Twin (Compound) Turbo Kit

- 5" Intake
- Dry Air Filter
- Outerwears Pre-Filter cover
- 3.5" Cold Side Charge Pipe
- 3.5" Turbo Inlet Horn
- 3" One Piece Y-bridge with HD Bead roll end
- 3" Cold Side Intercooler Pipe
- 14g Aluminum Construction
- Powder Coating
- Silicone Boots
- T-Bolt Clamps
- V-Band Clamps
- 3" Steel Turbo Hot Side Cross Over Pipe
- 4" Steel Turbo Down Pipe
- Heat Wrap & Clamps
- High Temp Black Ceramic Coating on Hot Side Pipes
- Atmosphere Turbo Pedestal with Built in Oil Return Fitting
- Coolant Overflow Tank with Hoses, Fittings, & Low Coolant Sensor
- Stainless steel oil feed and drain lines with fittings
Availability: Gloss Black in stock and ships in 3-5 business days. 10-15 business day lead time on other colors.
Shipping: This Product cannot ship to the state of California
Pricing: $3,225.00

Customize Your Item

- Model Year -
 * required
- Powder Coating -
 * required
- Tag (Logo) Finish (PCUCTAG) -
 * required
- S400 T6 (Atmo) Turbocharger -
 * required
- Powder Coat S400 Turbo Cover -
 * required
- Up Pipes & Manifolds -
 * required
- 3" Driver Side Intercooler Pipe -
 * required
- Frame Rail Battery Tray -
 * required
- T6 Turbo Heat Blanket -
 * required
- T6 Exhaust Housing Finish -
 * required
- What intercooler do you have? -
 * required


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 / Stealth 64 Drop In Turbo - 900+ RWHP Capable with Supporting Modifications - Improved top end power with moderate spool characteristics. WCFab 750+ Built Allison transmission recommended.

Don't see what you're looking for here? Check out our S400/S300 or S400/S400 kits for ultra high performance applications or give our specialists a call at 630-277-8239 for assistance custom building a setup that will work best for your needs.

***This kit requires removal / relocation of the passenger side battery.***

Product Notes

This kit Requires Custom Tuning for proper operation and performance.
We recommend kits to be installed by a qualified diesel performance shop or mechanic.



Shipping Information

  • Item Requires Shipping
  • 60.0 lbs.
  • W24.0000” x H12.0000” x L36.0000”
  • This item ships in its own box.
  • This Product cannot ship to the state of California

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