Improve your LML Duramax's reliability and fueling capability with a CP3 conversion. Since its introduction, the CP4 has proven to be less reliable and less capable than the CP3 used in previous Duramax platforms.

Failures of the CP4 are extremely costly and require replacement of the entire fuel system. Our kit provides you with OEM fit-and-finish features like a brand new Bosch CP3 with heavy duty 10mm cam, Fleece exclusive molded hoses for the fuel feed and return, high flow CP3 fuel fittings, and our valley feed line to support aftermarket lift pump applications.

Features:

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

Kit Contents:

CP3 to rail high pressure fuel line
High flow CP3 feed and return fuel fittings
Preformed feed and return fuel lines
CP3 mounting adapter
Dosing injector fuel lines and mounting bracket
FCA extension harness
Low pressure fuel feed lines
Hardware kit

Application Notes:
This kit has been tested for use in stock application trucks that did not utlize a fuel 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.

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.
Covered under SC-E Emissions certificate: SC-FLC01-0013

What LML CP3 Conversion Kit is right for you? 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.

CP3 Conversion Kit

CP3 Conversion Kit with CP3 for 2011-2016 LML Duramax Fleece Performance

CP3 Conversion Hardware Kit (No Pump) for 2011-2016 LML Duramax Fleece Performance

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

2017-2022 Chevy Duramax L5P DCR Pump Conversion Kit. CA Excl.