Fleece Performance CP4 to CP3 Conversion Kit with with CP3K Pump for 2011-2016 GM 6.6L Duramax

Note: Not for Sale in the State of California

Diesel performance is simple – add fuel and air, and you add power. Unfortunately, the CP4 fuel injection pump on the 2011-2015 GM 6.6L LML Duramax is a bottleneck. The Fleece FPE-LML-CP3-FF-3K LML CP3 Conversion Kit with CP3K Pump converts your stock CP4 to a CP3.

Why convert your LML's fuel system from a CP4 to a CP3? The stock CP4 is only capable of supporting around 500 rwhp and has proven to be less reliable and less capable than the CP3 used in previous Duramax platforms. The included Fleece Performance CP3K is capable of supporting 650 rwhp in conjunction with the piezoelectric injectors.