Industrial 436404 CP3 Conversion Kit with 42% CP3 Pump | 2011-2016 GM 2500HD/3500HD 6.6L Duramax LML

Features:

• Replaces weak CP4 with proven CP3 pump
• Includes 42% over CP3 for more power
• Supports builds up to 600 horsepower
• Prevents costly CP4-related fuel system damage
• Designed for 2011–2016 LML Duramax engines
• Complete kit with all needed components
• Improves reliability in tuned and stock trucks
• Ideal for towing, work, or performance builds
• Requires custom tuning (EFILive or EZ LYNK)
• Backed by trusted Industrial Injection quality

Replace the Problem, Not the Whole Fuel System

If you drive a 2011–2016 LML Duramax, you've probably heard about the CP4 injection pump and its long list of failures. Even in stock trucks, the CP4 has been known to let go without warning—taking out injectors, lines, and sometimes the entire fuel system along with it. The Industrial Injection 436404 CP3 Conversion Kit with 42% Over CP3 Pump is a solution that doesn’t just prevent those issues, it improves performance along the way. This kit replaces the unreliable CP4 with a proven CP3 pump that’s been trusted for years in earlier Duramax platforms. And with 42% more flow than stock, it supports builds up to 600 horsepower—plenty for towing, daily driving, and mild performance upgrades.

Stronger, Smarter Fueling for the Long Haul

The kit comes complete with everything needed for the swap, making the conversion as straightforward as possible for experienced installers or performance shops. You’ll still need custom tuning—via EFILive or EZ LYNK—for the system to run properly, but once it’s dialed in, the difference in reliability and responsiveness is instantly noticeable. Whether you're tired of rolling the dice with a CP4 or building a truck that needs a more capable fuel supply, this CP3 conversion gives you peace of mind without compromising power or drivability. It's a practical upgrade with long-term value, built for people who count on their truck to do more than just get them from point A to point B.

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