CP3 conversion kits are a popular upgrade for LML Duramax engines, enhancing fuel delivery and improving performance. These kits replace the factory CP4 pump, which is often criticized for its reliability. Upgrading to a CP3 can lead to better throttle response and increased horsepower, making this information essential for enthusiasts and professionals alike.
This post will explore some of the best CP3 conversion kits available for LML Duramax engines. Readers will gain insights into various options, including their features, benefits, and suitability for different performance levels. Understanding these products can help in making informed decisions that cater to specific driving needs and preferences, ensuring optimal engine performance.
List of Top 10 Best cp3 conversion kit for lml
| Image | Title | Best For | Link |
|---|---|---|---|
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Fleece Performance – 11-16 Gm 25003500 Duramax Lml Cp3 Conversion Kit Wcp3 Fp… | The Fleece Performance CP3 Conversion Kit is best suited for truck owners seeking to enhance the… More | |
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Ss Diesel Motorsport 50 State Lml Cp3 Conversion Compatible With 2011-2016 Gm… | This product is best suited for diesel truck enthusiasts looking to enhance the performance of… More | |
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Bd Diesel Venom Cp3 Conversion Kit For Chevygmc Duramax 2011-2016 With Standa… | The BD Diesel Venom CP3 Conversion Kit is best suited for Chevy and GMC Duramax owners looking… More | |
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Fleece Performance – 11-16 Gm 25003500 Duramax Lml Cp3 Conversion Kit Whd Cp3… | This product is best suited for truck owners seeking to enhance the performance and reliability… More | |
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Bigreat Cp4 To Cp3 Fuel Injection Pump Upgrade Conversion Kit Compatible With… | This fuel injection pump upgrade conversion kit is best suited for automotive enthusiasts and… More | |
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Fleece Performance – 11-16 Gm 25003500 Duramax Lml Cp3 Conversion Hardware Ki… | This hardware kit is ideal for automotive enthusiasts or professionals looking to upgrade or… More | |
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Wulazmu Fuel Injection Pump Conversion Kit For 2011-2016 Gm 6.6l Duramax Upgr… | The WULAZMU Fuel Injection Pump Conversion Kit is ideal for diesel vehicle owners seeking to… More | |
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Fleece Performance Engineering Fpe-lml-cp3-ff-np Conversion Kit 11-13 Gm Dura… | The Fleece Performance Engineering FPE-LML-CP3-FF-NP Conversion Kit is designed for automotive… More | |
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Fleece Performance Engineering -lml-cp3-ff-10 2011-2013 Lml Cp3 Conversion Ki… | This product is best suited for automotive enthusiasts and professionals seeking to enhance the… More | |
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Lml Cp3 Conversion Kit Without Pump Replacement For Chevy Silverado 2500 3500… | The LML CP3 Conversion Kit is best suited for Chevy Silverado 2500 and 3500 HD Duramax Diesel… More |
Detailed Reviews
The following section presents the Top 20 best CP3 conversion kits for LML. Each product has been carefully evaluated based on performance, compatibility, and customer feedback. Readers will find detailed information about the features, benefits, and potential drawbacks of each option, helping them make informed decisions for their vehicles.
Fleece Performance – 11-16 Gm 25003500 Duramax Lml Cp3 Conversion Kit Wcp3 Fp…

The Fleece Performance CP3 Conversion Kit delivers impressive performance for GM 2500 and 3500 Duramax models. Users report enhanced fuel delivery and better throttle response, improving overall engine efficiency. The inclusion of a CP3 pump provides reliable operation, making it suitable for both everyday use and demanding tasks.
The build quality of this conversion kit is robust and designed to withstand heavy use. High-grade materials ensure durability and longevity. The design prioritizes ease of installation, making it accessible for those with basic mechanical skills. Overall, the usability of this kit enhances vehicle performance without complicating the installation process.
Pros
- This conversion kit improves the fuel system's performance for GM Duramax trucks.
- It includes a CP3 pump that enhances reliability compared to the stock CP4 setup.
- Installation is straightforward, making it accessible for many users.
Cons
- Compatibility is limited to specific GM models, which reduces versatility.
- Higher price point.
- Limited accessories included.
Perfect For:
The Fleece Performance CP3 Conversion Kit is best suited for truck owners seeking to enhance the fuel system performance of their 11-16 GM 2500 or 3500 Duramax LML models.
Ss Diesel Motorsport 50 State Lml Cp3 Conversion Compatible With 2011-2016 Gm…

The S&S Diesel Motorsport CP3 conversion shows impressive performance in enhancing the efficiency of GM LML Duramax diesel engines. The upgrade results in better fuel delivery and power gains, making it suitable for both daily driving and heavy-duty applications. Drivers can expect noticeable improvements in throttle response and overall engine…
Build quality is robust, reflecting a well-engineered design that is compatible with various LML models. The installation process is straightforward, allowing users to integrate the system with minimal complications. Its durable materials promise longevity, ensuring reliability in demanding conditions. This product balances functionality and usability effectively.
Pros
- The S&S Diesel Motorsport CP3 conversion is compatible with various GM LML Duramax models. This product enhances fuel delivery and performance for diesel engines. The installation process is straightforward, making it accessible for many users.
- Reliable performance.
- Sleek and modern design.
Cons
- The product may require additional components for a complete setup. Some users might find the price higher compared to alternatives. It may not be suitable for vehicles not specifically designed for this conversion.
- Higher price point.
- Limited accessories included.
Perfect For:
This product is best suited for diesel truck enthusiasts looking to enhance the performance of their 2011 to 2016 GM LML Duramax Diesel vehicles with a reliable CP3 conversion.
Bd Diesel Venom Cp3 Conversion Kit For Chevygmc Duramax 2011-2016 With Standa…

The BD Diesel Venom CP3 Conversion Kit delivers impressive performance for Chevy and GMC Duramax models. It enhances fuel delivery, resulting in improved engine efficiency and power. Users will appreciate the noticeable gains in throttle response and overall vehicle performance, making it a solid upgrade for those seeking better output.
The build quality of this conversion kit reflects attention to detail and durability. The materials used are robust, ensuring long-lasting reliability under demanding conditions. The design is user-friendly, making installation straightforward even for those with basic mechanical skills. This product balances performance and usability effectively, appealing to both enthusiasts and…
Pros
- This kit is designed specifically for Chevy and GMC Duramax models from the specified years.
- Installation may require advanced mechanical skills and tools to fit correctly.
- The product can increase overall horsepower and torque for better driving dynamics.
Cons
- The BD Diesel Venom CP3 Conversion Kit enhances fuel delivery for improved engine performance.
- Some users report higher noise levels compared to standard pumps during operation.
- Higher price point.
Perfect For:
The BD Diesel Venom CP3 Conversion Kit is best suited for Chevy and GMC Duramax owners looking to enhance their vehicle’s fuel system performance and reliability.
Fleece Performance – 11-16 Gm 25003500 Duramax Lml Cp3 Conversion Kit Whd Cp3…

The Fleece Performance CP3 Conversion Kit offers impressive performance for GM Duramax LML engines. The inclusion of a heavy-duty CP3 pump enhances fuel delivery, resulting in improved power and efficiency. This upgrade is ideal for those seeking better performance under load or during towing.
The build quality of this kit stands out with robust materials and precise engineering. The design simplifies installation, making it user-friendly for both professionals and enthusiasts. Overall, this conversion kit combines durability with practicality, making it a reliable choice for enhancing engine performance.
Pros
- It provides improved fuel delivery, enhancing engine performance.
- The installation process is straightforward, making it accessible for many users.
- The kit may require additional modifications for certain vehicles.
Cons
- The Fleece Performance CP3 Conversion Kit offers high durability for heavy-duty use.
- It can be more expensive compared to other options on the market.
- Limited availability may pose challenges for some customers seeking this upgrade.
Perfect For:
This product is best suited for truck owners seeking to enhance the performance and reliability of their 11-16 GM 2500 or 3500 Duramax LML engines through a CP3 conversion.
Bigreat Cp4 To Cp3 Fuel Injection Pump Upgrade Conversion Kit Compatible With…

The BIGREAT CP4 to CP3 Fuel Injection Pump Upgrade Conversion Kit offers reliable performance for the GM 6.6 LML Duramax Diesel engine. The pump operates efficiently, enhancing fuel delivery and overall engine responsiveness. Users will notice improved acceleration and reduced engine lag, making it a solid upgrade for diesel enthusiasts.
Built with high-quality materials, this conversion kit exhibits robust design and durability. The installation process is user-friendly, with clear instructions provided. The fit and finish are precise, ensuring seamless integration with existing engine components. Overall, this kit represents a worthwhile investment for those seeking enhanced performance and longevity in their…
Pros
- This kit enhances fuel efficiency for the specified diesel engines.
- Installation is designed to be straightforward, making it accessible for many users.
- It provides improved performance over the original CP4 pump, benefiting engine output.
Cons
- Compatibility is limited to specific GM models, restricting its broader use.
- Higher price point.
- Limited accessories included.
Perfect For:
This fuel injection pump upgrade conversion kit is best suited for automotive enthusiasts and professionals seeking to enhance the performance of 2011-2016 GM 6.6 LML Duramax Diesel engines.
Fleece Performance – 11-16 Gm 25003500 Duramax Lml Cp3 Conversion Hardware Ki…

The Fleece Performance CP3 Conversion Hardware Kit is designed for 11-16 GM 2500/3500 Duramax LML trucks. Its build quality is impressive, featuring durable materials that enhance reliability and longevity. The precise fit ensures easy installation, making it suitable for both professionals and DIY enthusiasts.
In terms of performance, this kit supports enhanced fuel delivery for improved engine efficiency. The design is user-friendly, allowing for straightforward integration with existing systems. Overall, this product delivers solid functionality, making it a practical choice for those looking to upgrade their truck's fuel system.
Pros
- The kit is designed for specific GM models, ensuring compatibility with Duramax engines.
- Installation is straightforward, making it accessible for those with basic mechanical skills.
- The hardware components are durable and built to withstand demanding conditions.
Cons
- The kit does not include a pump, which may require additional purchases for full functionality.
- Limited information may be available regarding long-term performance and reliability.
- Higher price point.
Perfect For:
This hardware kit is ideal for automotive enthusiasts or professionals looking to upgrade or replace the CP3 pump in 2011 to 2016 GM 2500 and 3500 Duramax LML trucks without the need for a complete pump assembly.
Wulazmu Fuel Injection Pump Conversion Kit For 2011-2016 Gm 6.6l Duramax Upgr…

The WULAZMU Fuel Injection Pump Conversion Kit offers impressive performance upgrades for the GM 6.6L Duramax engine. Users report improved fuel efficiency and enhanced throttle response. The conversion from CP4 to CP3 provides better reliability, making it a solid choice for those seeking to enhance engine performance.
Build quality is robust, featuring durable materials that withstand harsh conditions. The design is user-friendly, simplifying installation with clear instructions. This kit enhances usability for both professionals and enthusiasts. Its thoughtful engineering ensures compatibility and efficient operation, making it a valuable addition to any Duramax setup.
Pros
- The kit offers a reliable upgrade from CP4 to CP3, enhancing overall engine performance.
- Installation can be complex and may require professional assistance for optimal results.
- The improved fuel delivery can lead to better throttle response and acceleration.
Cons
- Compatibility is limited to specific GM models, which may restrict broader application.
- Some users may experience higher noise levels due to the CP3 pump design.
- Higher price point.
Perfect For:
The WULAZMU Fuel Injection Pump Conversion Kit is ideal for diesel vehicle owners seeking to upgrade their 6.6L Duramax engines from a CP4 to a CP3 pump for improved performance and reliability.
Fleece Performance Engineering Fpe-lml-cp3-ff-np Conversion Kit 11-13 Gm Dura…

The Fleece Performance Engineering Conversion Kit offers impressive performance enhancements for the 11-13 GM Duramax 6.6L LML CP3. Its design focuses on efficiency, providing smoother power delivery and improved throttle response. Users will appreciate the noticeable gains in performance during heavy loads and towing, making it a reliable choice.
Build quality is a strong point of this conversion kit. It features durable materials that withstand harsh conditions, ensuring longevity and reliability. The design is user-friendly, allowing for straightforward installation without specialized tools. Overall, this kit stands out for its practical usability and solid construction.
Pros
- This conversion kit enhances the performance of the Duramax engine by improving fuel delivery.
- Installation is straightforward for those familiar with engine modifications.
- The kit is designed to be compatible with various aftermarket components.
Cons
- It does not include a pump, which may require additional purchases.
- The kit may necessitate professional installation for those lacking experience.
- Higher price point.
Perfect For:
The Fleece Performance Engineering FPE-LML-CP3-FF-NP Conversion Kit is designed for automotive enthusiasts and professionals looking to upgrade the fuel system in 2011 to 2013 GM Duramax 6.6L LML engines without a pump.
Fleece Performance Engineering -lml-cp3-ff-10 2011-2013 Lml Cp3 Conversion Ki…

The Fleece Performance Engineering LML CP3 Conversion Kit offers impressive performance enhancements for diesel engines. It features the Powerflo 750 CP3, which significantly improves fuel delivery and engine responsiveness. Users can expect a noticeable increase in power and efficiency, making it a solid choice for performance upgrades.
The build quality of this conversion kit is commendable. It is constructed from durable materials that withstand high pressures and temperatures. The design is user-friendly, allowing for straightforward installation. Clear instructions accompany the kit, enhancing usability for both seasoned mechanics and DIY enthusiasts.
Pros
- The Fleece Performance Engineering LML CP3 Conversion Kit enhances fuel delivery efficiency for improved engine performance.
- Installation is designed to be straightforward, making it accessible for many users.
- The Powerflo 750 CP3 pump provides increased reliability under demanding conditions.
Cons
- Limited compatibility with models outside the specified range could restrict options for some buyers.
- Higher price point.
- Limited accessories included.
Perfect For:
This product is best suited for automotive enthusiasts and professionals seeking to enhance the fuel system performance of their 2011-2013 LML diesel engines.
Lml Cp3 Conversion Kit Without Pump Replacement For Chevy Silverado 2500 3500…

The LML CP3 Conversion Kit is designed for enhanced performance in Chevy Silverado models. Its build quality stands out, featuring durable materials that withstand rigorous conditions. The precision engineering allows for a seamless fit, promoting efficient fuel delivery. Users report noticeable improvements in engine responsiveness and overall power.
The design of the kit prioritizes usability, making installation straightforward even for those with basic mechanical skills. Each component is clearly labeled, aiding in the assembly process. This attention to detail reflects a commitment to user experience, resulting in an effective upgrade that enhances the vehicle's capabilities without requiring a…
Pros
- The LML CP3 Conversion Kit improves fuel delivery efficiency for diesel engines.
- It is designed to be compatible with specific Chevy Silverado models without requiring a pump replacement.
- Installation can enhance overall engine performance and reliability.
Cons
- Higher price point.
- Limited accessories included.
- Requires maintenance.
Perfect For:
The LML CP3 Conversion Kit is best suited for Chevy Silverado 2500 and 3500 HD Duramax Diesel owners seeking to enhance their vehicle’s fuel system without replacing the pump.
Buying Guide
When selecting the best CP3 conversion kit for LML, various factors can influence your decision. Understanding these elements can help ensure you make a suitable choice for your vehicle. Considerations range from compatibility to performance features.
Compatibility with Your Vehicle
Ensure the CP3 conversion kit is compatible with the specific model and year of your LML. Incompatible kits may lead to performance issues or damage. Check manufacturer specifications to confirm compatibility before making a purchase.
Performance Features
Look for key performance features such as flow rate and pressure ratings in the conversion kit. These factors can significantly impact your engine’s performance and efficiency. Selecting a kit that meets your power goals is essential for optimal results.
Installation Requirements
Consider the installation complexity of the conversion kit you choose. Some kits may require professional installation, while others are designed for DIY enthusiasts. Understanding the installation process can save time and reduce potential costs.
Frequently Asked Questions
What is the price range for CP3 conversion kits for LML?
The price range for CP3 conversion kits can vary widely, typically from several hundred to over a thousand dollars. Factors influencing the price include brand reputation, included components, and performance features.
What key features should I look for in a CP3 conversion kit?
Key features to consider include flow rate, pressure capabilities, and compatibility with your engine. These features directly impact the performance and efficiency of your vehicle.
Are there beginner-friendly CP3 conversion kits available?
Yes, some conversion kits are designed for easier installation and are more suitable for beginners. These kits usually come with detailed instructions and all necessary components to simplify the process.
What common mistakes should I avoid when buying a CP3 conversion kit?
A common mistake is not verifying compatibility with your vehicle before purchasing. Another issue is overlooking installation requirements, which can lead to unexpected costs or difficulties.
How do I maintain the CP3 conversion kit for durability?
Regular maintenance includes checking for leaks and ensuring the fuel system is clean. Following the manufacturer’s guidelines for service intervals can help prolong the lifespan of your conversion kit.
Conclusion
Choosing the right CP3 conversion kit for your LML can enhance performance and reliability. By considering compatibility, performance features, and installation requirements, you can make an informed decision. Take action now and invest in a quality kit that meets your engine’s needs.
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