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11-16 LML Duramax WCFAB Street Series CP3 Conversion Kit

11-16 LML Duramax WCFAB Street Series CP3 Conversion Kit

List price: $549.00  


You save: $16.47 (3%)

*By checking this I accept that it will take between 10 and 12 business days to build and ship out this product.


  The Factory CP4.2 Pump Found on 2011 and newer Duramax's has been known to be a problematic Component. Even the slightest amount of fuel or water Contamination can ruin the pumps internals very quickly leading to metal debris spread throughout the entire fuel system. When these pumps fail it can lead to very costly repair jobs usually including all new fuel injectors, fuel system sensors, fuel lines, and complete cleaning of the fuel tank. We set out to develop a solution for this issue and came to market with the first CP3 Conversion kit in 2013. Our kit is tried and true and offers some items that other copy-kits on the market do not; a common issue we encountered is customers installing the CP3 Pump would break the brittle cast aluminum OEM pump mount bracket, so we designed a stronger Billet Aluminum piece to replace it and have not had an issue since. The Street Series Kit uses a smaller I.D. high-pressure line than the Race Series Kit which connects to the factory port on the passenger side rail, where the CP4 use to feed. This kit is easier to install since the plug does not need to be removed from the rear of the passenger side fuel rail. We recommended this kit to be used with a stock or sportsman CP3 Pump. Any truck that is used in a performance application and is no longer under warranty we strongly recommend replacing the CP4 pump with the more robust and proven CP3 pump. 


  • Billet Anodized CP3 Pump Mount Plate
  • High-Pressure Fuel Line
  • High-Pressure Rail Plug & Cap
  • Fuel line and Clamps
  • Stainless CP3 Feed and Return Barb Fittings
  • 9th Injector Line Plug
  • Stainless Hardware

Product Number: WCF100711.

Click here for Wehrli powder coat samples

Wehrli Custom Powder Coating is housed under the same roof as Wehrli Custom Fabrication. This has Enabled them to provide exceptional turn around time and Quality Control of our Finished Fabricated Components. Wehrli can powder coat items of all sizes. Above is Pictures of our Most Popular Colors that we nearly always have in stock. if you're looking for something one of a kind or different. For custom colors, please enter a powder coat color of your choice above. Shipping times and pricing may be adjusted according to color choice. 

Available in many custom powder coat colors to customize your engine bay to your liking. Kits are in stock and can ship in 1-3 days depending on Powder Coat Color.

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