Products Showing Parts for — {{ }}

No Results Showing Parts for — {{ }}
Part #: FPE-LML-CP3-FF-3K

Fleece FPE-LML-CP3-FF-3K LML CP3 Conversion Kit with CP3K Pump

2011-2016 GM 6.6L Duramax LML (650HP)
Part #: FPE-LML-CP3-FF-3K
$1783.00 - Extended MFG. Backorder
Our Recommendations Compatible Products
Scroll to View More


The Fleece FPE-LML-CP3-FF-3K LML CP3 Conversion Kit with CP3K Pump for your 2011-2016 GM 6.6L Duramax is designed to convert your stock CP4 to a CP3. Why convert your LML's Fuel System from a CP4 to a CP3? The stock CP4 is only capable of supporting up to ~500rwhp. The included Fleece Performance CP3K is capable of supporting 650 rwhp in conjuction with the piezoelectric injectors. The CP4 was introduced as a cost reduction to the LML platform since a smaller amount of fuel is required when running the more efficient piezoelectric injectors. Since its introduction it has proven to be less reliable and less capable than the CP3 used in previous duramax platforms.


  • Convert CP4 To CP3
  • Includes Fleece CP3K CP3 Pump
  • Increased Reliability & Performance
  • Includes Fuel Line, Adapters & Hardware

Warning: This product is not legal in the state of California.When used incorrectly this product 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 Fleece Performance Engineering, Inc. 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. Fleece Performance Engineering, Inc. 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. 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 from Fleece Performance. Failure to install the correct calibrations can result in engine damage.


  • MFG. NumberFPE-LML-CP3-FF-3K
  • Manufacturer NameFleece Performance
  • Shipping Weight25.00 lb.
  • Shipping Length16 in.
  • Shipping Width16 in.
  • Shipping Height12 in.


Be the first to rate this item!

Write Review

Customer Photos

Customer Photos

See what others built Submit your photo

Questions and Answers

Ask XDP a Question about this product (Allow 24-48 hours for reply)

Most Popular Questions

Is tuning required when using this kit or is it bolt on and go?
View Staff Answer 
The Fleece FPE-LML-CP3-FF-3K LML CP3 Conversion Kit requires the use of custom tuning.
Emissions Notice

This product is not legal for sale or street use in California. Certain aftermarket products are subject to governmental emission standards regulated by the California Air Resources Board. In order for these products to be legal on a specific vehicle in California, the part number must receive a CARB Executive Order (EO) number. This number makes the part legal for use only on specific years, makes and models of vehicles. A decal with CARB EO number for these parts must be displayed in the engine bay to satisfy smog inspection requirements.