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Engineered Diesel

CP3 - IMPROVED Stock - GM Chevy Duramax 6.6L - LLY - 2004.5 - 2005

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25.00 LBS
Please allow 1-2 business days before shipping.
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Product Description

 *Image is a representation of this item. Actual item may vary.

CP3 - IMPROVED Stock - GM Chevy Duramax 6.6L - LLY - 2004.5 - 2005


Replaces Part# 




 FREE Standard shipping for lower 48!


*TUNING REQUIRED - To increase flow, this pump comes with a LBZ Fuel Pressure Regulator (FPR) pre-installed. Tuning is required for this higher flowing FPR.

** NO High Flow Regulator - You may opt to leave the OEM LLY FPR on for a true drop-in replacement CP3. This will not require any tuning but you will no longer have the benefit of the increased flow. You will, however, still get the durability and reliability of the polished lifters, high flow suction valves, etc.


This is Engineered Diesel's Improved Stock CP3. 

We started with a BRAND NEW OEM CP3, then we redesigned the internal components for increased flow & reliability throughout the RPM range. The greatest increase in flow will be seen at higher RPMs. When compared to a stock CP3, our Improved Stock CP3 is much more durable!


- Plungers are DLC coated 

- Polygon is DLC coated 

- Cam is Rockwell 65 hardness 

- Lifters are Rockwell 65 hardness 

- Micro Polished lifters 

- Highflow suction valves 

- Modified housing for increased case pressure resulting in better plunger fill rate


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Product Reviews

  1. Perfect 5 Star Review

    Posted by on 15th Jan 2018

    I had placed my order at about 1pm and they had it shipped out same day which was awesome. Also got it in and was able to start my truck without the tune in it yet, but a tune is needed, great product!

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