2004-2005 Duramax Dual CP3 Kit w/ Pump (DCP3CLLY)

The Industrial Injection Dual CP3 Kit for the 2004-2005 LLY 6.6L Duramax is a dual CP3 fueling upgrade for high-output builds. This kit includes a second CP3 pump and the controller hardware needed to run both pumps in parallel — available with two 85% Dragon Fire CP3s (Dueling Dragons) or two 120% CP3s (Dueling Double Dragons) for competition use. This version ships with the pump included.

With two pumps working together, each delivers half the total fuel volume, so the drive load on the original internal CP3 is cut by 50%. That keeps fuel pressure constant under load, lowers EGTs, and improves overall pump reliability. If one pump fails, the controller automatically routes full fuel delivery to the remaining pump so the truck keeps running.

• Includes the second CP3 pump
• Multiple pump options — 85% Dueling Dragons or 120% Dueling Double Dragons
• Both pumps share the fuel-delivery load
• Drive load on the original CP3 reduced by 50%
• Constant optimum fuel pressure under load, lower EGTs
• Controller automatically switches to the working pump in the event of a failure