CP3 Conversion Kit w/ 85% CP3 Pump

Features:

• Replaces failure-prone CP4 with CP3 pump
• Includes 85% over CP3 for higher output
• Supports builds up to 800 horsepower
• Proven reliability in performance applications
• Helps prevent costly fuel system damage
• Complete conversion kit for 2011–2016 LML Duramax
• Designed for GM 2500HD and 3500HD trucks
• Requires custom tuning (EFILive or EZ LYNK)
• Improves fuel delivery under heavy load
• Ideal for modified or high-performance trucks

Say Goodbye to CP4 Failures Upgrade with Confidence

If you own a 2011–2016 GM 2500HD or 3500HD with the 6.6L LML Duramax, you've probably heard the horror stories about the stock CP4 injection pump. Even on unmodified trucks, these pumps are known to fail without warning, and when they do, they often take the entire fuel system down with them. The Industrial Injection 436405 CP3 Conversion Kit with 85% Over CP3 Pump is the go-to fix for anyone tired of rolling the dice. This isn’t just a replacement, it’s a complete upgrade, giving you a proven CP3 setup that’s built to support big power and long-term reliability. With an 85% over pump, this kit can fuel up to 800 horsepower, making it a no-brainer for anyone running larger injectors, a tuned ECM, or a larger turbo setup.

Built to Perform, Designed to Last

Unlike the CP4, the CP3 has a strong track record in high-performance applications and is well-respected for its durability under heavy loads. This kit includes everything you need for the conversion, making it a straightforward solution to a well-known problem. It's ideal for daily drivers, tow rigs, or weekend warriors who want to drive with confidence and peace of mind. One important thing to note, custom tuning is required to make this kit work correctly, so you'll need a solution like EFILive or EZ LYNK to dial it in. But once it’s set up, you're left with a much more capable and dependable fuel system that won't leave you stranded or staring at a hefty repair bill.

Fitment: 2011, 2012, 2013, 2014, 2015, 2016 GM 2500HD/3500HD 6.6L Duramax LML