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CP3 Conversion Kit With CP3 Pump 2011-2016 GM 2500/3500 Duramax LML Fleece Performance
SKU: FPE-LML-CP3-10-FQWW
Convert your 2011–2016 LML Duramax from a CP4 to a CP3 for proven reliability and fueling. Kit supports 600+ rwhp with CP3K and up to 850+ rwhp with PowerFlo 750. Includes all hardware for a smooth installation.
Vehicle Specific
Check if this part fits your vehicle.
Upgrade your 2011–2016 LML Duramax’s fuel system and safeguard your engine against costly CP4 failures with our CP4 to CP3 Conversion Kit. The factory CP4 pump is notorious for being less reliable and less capable than the CP3 used in earlier Duramax platforms, often resulting in expensive repairs when it fails.
Our CP3 conversion kit allows you to easily adapt a proven CP3 pump to your LML Duramax, dramatically improving reliability and fueling capability. When paired with your LML’s piezoelectric injectors, a CP3K conversion can support 600+ rear-wheel horsepower (rwhp), while a PowerFlo 750 conversion can handle nearly 850+ rwhp, making this kit ideal for both daily drivers and high-performance builds.
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 inch
CP3 Pump Fittings – 1/2 inch
(2) Sealing Washers
Low Pressure Fuel Feed Line
3/8" x 8" Flexible Fuel Line with Hose Clamps (CP3 Return)
1/2" x 30" Flexible Fuel Line with Hose Clamps (Filter to CP3)
3/4" P-Clamp
Why Convert?
The CP3 pump is a proven upgrade for the LML Duramax, delivering better reliability, greater fueling capability, and the peace of mind diesel owners demand. Whether you’re looking to prevent costly fuel system failures or planning for major horsepower upgrades, this kit provides OEM-level fit-and-finish with all the parts you need for a straightforward installation.
- Engine Year2011-2016
- Property 65 WarningCALIFORNIA WARNING: Cancer and Reproductive Harm -www.P65Warnings.ca.gov
- Vehicle TypeTruck/SUV
- BrandFleece Performance
- Country of OriginUSA
- Sold AsKit
Shipping Times
Most customers will see their parts within 3-5 business days. We will primarily ship with Purolator ground & DHL Express to ensure the fastest shipping possible.
Please Note: These are only estimates and shipping time may vary depending on your location, out of country and rural locations expect longer wait times.
Where Do We Ship
We will ship our products within Canada and the United States.
Please Note: There are limitations what can be shipped to the United States.
Damaged Shipments
We provide the option to purchase insurance as we are not responsible for any damage while with a courier, we don’t often see issues, but it does happen. If you purchased insurance we will put in a claim, if no insurance was purchased there will be no refunds or exchanges.
Return Policy
It happens sometimes we would like to return it. Here are our return rules:
- Prior to any return you must contact us and get an approval for a RMA number.
- Product must be unopened and have no damage.
- You must pay for the shipping back, please insure so if anything happens you can make a claim, we are not responsible for damage during shipping and is the sole responsibility of the customer.
- Regular products are subject to a 5% Restocking fee.
- Items over 50 lbs. or special orders will be subject to a 20% Restocking fee.
- Electronics & Tuning is a final sale and cannot be returned.