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The Fleece Performance CP3K is a modified LBZ CP3 for 2001–2013 GM 6.6L Duramax (LBZ/LMM) that eliminates the factory fuel flow restriction beginning at 3,000 RPM and restores rail pressure through the usable rev range. This cost-effective upgrade keeps fuel delivery consistent where stock pumps lose flow, helping preserve horsepower under load. Note: fuel pressure regulator must be scaled for 2001–2005 LB7 or LLY installations.
Fleece Performance 01-13 GM Duramax 6.6L Duramax CP3K (LBZ/LMM Based)
