Dynomite Diesel CP4-421 Reman Stock CP4 | 2011-2016 GM 2500HD/3500HD 6.6L Duramax

Features:

• Direct replacement for stock CP4 pump
• Remanufactured to meet original performance standards
• Designed for 6.6L LML Duramax engines
• Restores proper fuel pressure and injection timing
• Ideal for trucks running stock power levels
• Built for long-term reliability and durability
• Compatible with diesel fuel systems only
• Not legal for sale in California
• Backed by trusted Dynomite Diesel quality

Restore Your Duramax’s Fuel System with Confidence

If you're dealing with a failing CP4 pump on your 2011–2016 GM 2500HD or 3500HD Duramax, the Dynomite Diesel CP4-421 Remanufactured Stock CP4 is the smart solution to get your truck running right again. Built specifically for the 6.6L LML Duramax, this pump is remanufactured to exacting standards to meet original factory performance. That means you get the fuel pressure and reliability your truck needs without the massive price tag of a brand-new unit. Whether you’re maintaining a workhorse that sees heavy towing or keeping your daily driver in top shape, replacing a worn or failing CP4 pump is critical to protecting your injectors, maintaining efficiency, and ensuring long-term engine health.

Built for the Long Haul with Proven Quality

Dynomite Diesel’s reputation for high-quality reman parts is well earned, and this CP4 is no exception. Each pump is thoroughly inspected, rebuilt, and tested to perform just like it did from the factory, so you can bolt it in with confidence and get back on the road without second-guessing your fuel system. It’s a direct fit for stock applications and installs just like the original, helping you avoid unnecessary downtime or expensive additional modifications. Please note, however, that this unit is not available for sale in California due to emissions regulations. When it comes to protecting your Duramax investment, the Dynomite Diesel CP4-421 is a smart, dependable choice that gets the job done right.

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