Fleece Performance 01-13 GM Duramax 6.6L Duramax CP3K (LBZ/LMM Based)

Designed to eliminate the factory fuel flow restriction that begins at 3000 RPM; Correlates to lost horsepower when you need it most; Cost effective upgrade; Fuel pressure regulator will need to be scaled appropriately when installed in a 2001-2005 (LB7 or L

Every Fleece Performance CP3 is tested on our in-house engine simulator and pump test stand to simulate real world situations and ensure that each pump is ready to work for you!

The Fleece Performance CP3K is a modified Duramax LBZ CP3 designed to eliminate the factory fuel flow restriction that begins at 3,000 RPM. If you have a stock CP3 pump you are losing fuel flow and rail pressure after 3000 RPM, which correlates to lost ho