Fuel Pump

We've got a number of choices when it comes to CP3 conversion kits, let us help you in the proper selection: FPE-LML-CP3-NP: Our "No Pump" kit for the LML CP3 conversion gives you the option to select your own CP3 pump for your application. Our kit provides you with all of the hardware you need to adapt a LBZ/LMM based Bosch CP3 to your 2011-2016 LML Duramax. FPE-LML-CP3-WP: Our "With Pump" kit for the LML CP3 conversion gives you a brand new LBZ/LMM Bosch CP3 along with all of the hardware you need to convert your CP4 equipped Duramax to a CP3. This kit is designed for use with or without a low pressure lift pump. For optimal performance, if the truck is equipped with a lift pump, the feed pressure to the CP3 should not exceed 11 psi when utilizing this kit. FPE-LML-CP3-10: Our Heavy Duty kit for the LML CP3 conversion features a brand new LBZ/LMM Bosch CP3 equipped with a Fleece Performance 10mm stroker cam along with all of the hardware you need to convert your CP4 equipped Duramax to a CP3. This kit is designed for use with or without a low pressure lift pump. For optimal performance, if the truck is equipped with a lift pump, the feed pressure to the CP3 should not exceed 2 psi. A lower rate spring is available from Fleece Performance for customers with a PowerFlo lift pump. Engine surging may be induced by the additional fuel pressure of a lift pump operating at pressures over 2 psi. For higher lift pump pressures, FCA table values will require adjustment.

• Heavy Duty CP3 with 10mm displacement cam
• High flow CP3 feed and return fittings
• Preformed feed and return fuel lines

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Product Downloads

#	Document Type	Download
1.	Installation Instructions
2.	Datasheet

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Reference Information

LML CP3 Conversion Kit with Heavy Duty CP3 for 2011-2016 Duramax

Fleece Performance offers LML CP3 conversion kits for a variety of truck applications. Why convert your LML's fuel system from a CP4 to a CP3? Since its introduction, the CP4 has proven to be less reliable and less capable than the CP3 used in previous Duramax platforms—resulting in costly repairs for owners when a CP4 fails. These CP3 conversion kits let you easily adapt a CP3 to your 2011-16 Duramax. In conjunction with the piezoelectric injectors, a CP3K conversion is capable of supporting 600+ rwhp, and a PowerFlo 750 conversion is capable of supporting nearly 850+ rwhp.

Kit contents:
• High pressure fuel rail line
• Fuel rail plug and nut
• CP3 block adapter with O-ring
• (3) CP3 block adapter bolts (flange head, M8x1.25x35mm)
• CP3 pump fittings—3/8 in.
• CP3 pump fittings—1/2 in.
• (2) Sealing washers
• Low-pressure fuel feed line
• 3/8 in. x 8 in. flexible fuel line with hose clamps (CP3 return)
• 1/2 in. x 30 in. flexible fuel line with hose clamps (filter to CP3)
• 3/4 in. P-clamp
• Fuel return line blockoff with O-ring