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Wehrli Custom Fabrication 2003-2007 5.9L Cummins S400/Stock Twin Turbo Kit - WCF100567

  • 5" Intake
  • Dry Air filter
  • Outerwear's Pre-Filter Cover
  • Stainless Steel Oil Feed and Drain Lines with Fittings
  • 4" Turbo Down Pipe
  • 3" Turbo Hot Side Cross Over Pipe
  • 3" Cold Charge Pipe Between Turbos
  • O-ring seals
  • Silicone Boots
  • T-Bolt Clamps
  • V-Band Clamps
  • Install Hardware
  • Heat Wrap & Clamps
  • High Temp Black Ceramic Coating on Hot Side and Down Pipe
  • Powder Coating
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: $2,295.00

Customize Your Item

- Model Year -
 * required
- Powder Coating -
 * required
- High Flow Intake Horn & IC Pipe -
 * required
- Grid Heater -
 * required
- 3" Hot Side Intercooler Pipe -
 * required
- S400 Turbo Charger Size -
 * required
- Powder Coat S400 Turbo Cover -
 * required
- Fleece Coolant Bypass Kit -
 * required
- Stainless Exhaust Manifold Stud -
 * required
- T6 Turbo Heat Blanket -
 * required
- T6 Exhaust Housing Finish -
 * required
- D&J Precision Billet Valve Cover -
 * required
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2003-2007 5.9L Cummins 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 Holset Turbo - Up to 750 RWHP with Supporting Modifications - Best Turbo Spool, performs well on stock fuel setups.

S480 / Stock Holset Turbo - 800+ RWHP Capable with Supporting Modifications - A better top-end performance that sacrifices a bit of spool on the lower end when compared to an S475/stock setup.

S480 / 63 or 64 Upgraded Drop-In Turbo - 900+ RWHP Capable with Supporting Modifications - Improved top end power with moderate spool characteristics

S480 / 67 Upgraded Drop-In Turbo - 1000+ RWHP Capable with Supporting Modifications - Best Top End Power, sacrifices low-end power and turbo spool - Manual trans trucks will allow best use of power band for this setup. Not recommended for tow rigs.

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 is designed to be used with the OEM exhaust manifold. If you would like to use an aftermarket OEM replacement style manifold like a Steed Speed 3rd Gen T3, you MUST send it in for the kit to be custom-built, and your lead time does not start until the manifold is in our possession.***

***Retains passenger-side factory battery location***

Product Notes

This kit Requires Custom Tuning for proper operation and performance.
Kit is designed to be used with the OEM 3rd gen exhaust manifold. If you want to use an aftermarket 3rd gen Style manifold you MUST send it in for kit to be custom built.
We recommend kits to be installed by a qualified diesel performance shop or mechanic.


Shipping Information

  • Item Requires Shipping
  • 40.0 lbs.
  • W12.0000” x H12.0000” x L48.0000”
  • Free Shipping!
  • This item ships in its own box.
  • This Product cannot ship to the state of California

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