11-16 GM 6.6L CP3 Conversion Kit

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11-16 GM 6.6L CP3 Conversion Kit

SKU: 131003

Availability: Out of stock

11-16 GM 6.6L CP3 Conversion Kit


This product is not legal in the state of California.
  • This product when used incorrectly may violate local, state, and federal laws pertaining to emissions, traffic, registration, and safety.
  • Use of this product may damage or destroy mechanical and/or electrical components of this vehicle.
  • Use of this product may void or nullify the vehicles factory warranty.
  • User understands that motorsports are dangerous, and that installation of this product may subsequently require special driving skills or techniques to safely operate the vehicle.
  • User assumes sole responsibility for the safe, proper, and legal use of the vehicle at all times.
  • The purchaser and end user releases, indemnifies, discharges, and holds harmless H&S Motorsports, LLC from any and all claims, damages, causes of action, injuries, or expenses resulting from or relating to the use or installation of this product that is in violation of the terms and conditions on this page, the product disclaimer, and/or the product installation instructions. H&S Motorsports will not be liable for any direct, indirect, consequential, exemplary, punitive, statutory, or incidental damages or fines cause by the use or installation of this product.



  • Fits all 2011 - 2016 6.6L LML Duramax
  • This product may not work with the EGR cooler installed. It may need to be removed.
  • This product MUST be used in conjunction with custom tuning calibrations. Failure to install the correct calibrations can result in engine damage.
  • An aftermarket low pressure fuel system is recommended. AirDog and FASS are the two most commonly used.


This kit will replace the factory CP4 high pressure fuel pump with a CP3 high pressure fuel pump. CP3 pumps are commonly found on the older Duramax (and Cummins) platforms and have proven to be very reliable. This kit is also great because it allows the use of highly modified CP3 pumps that can be used to provide a SERIOUS amount of high pressure fuel flow.

This kit includes a new stock CP3 pump.

Kit Contents

  • 1 - Brand New Bosch CP3 Pump
  • 1 - Billet CP3 Pump Adapter with O-Ring
  • 1 - High Pressure Fuel Line
  • 1 - Low Pressure Fuel Line
  • 1 - Fuel Return Line Block-Off
  • 1 - Hose, Clamps, Fittings, and other Hardware required for installation