Fleece Performance CP3 Conversion Kit 11-16 6.6L GM LML Duramax

With the release of the LML Duramax in 2011, GM made the switch from the reputable CP3 injection pump to the lower output CP4 pump. Numerous failures of the CP4 have been documented on stock trucks, creating a need for a reliable solution.

Fleece Performance Engineering's complete CP3 conversion kit delivers everything needed to swap out the failure-prone CP4 for a dependable CP3 pump. This comprehensive kit converts 2011-2016 Duramax fuel systems from CP4 to CP3 high-pressure pump technology, providing enhanced performance and peace-of-mind. The kit includes all necessary hardware to replace the troublesome CP4 with a CP3 and requires no tuning changes while maintaining all factory emissions controls.

Fleece Performance's 50-State Compliant LML CP3 Conversion Kit Features:

• Brand new Bosch CP3 high-pressure pump
• Fleece exclusive molded hoses for fuel feed and return
• High-flow CP3 fuel fittings
• Valley feed line to support aftermarket lift pump and filter applications
• OEM quality components throughout
• Improved fit and finish over previous generation kits

Why Choose Fleece Performance's CP3 Conversion:

• Increased Power Capability: The stock CP4 is only capable of supporting up to ~500rwhp, while Fleece's CP3 conversion supports 600+ rwhp in conjunction with piezoelectric injectors
• Enhanced Reliability: The CP4 was introduced as a cost reduction measure for the LML platform and has proven less reliable than the CP3 used in previous Duramax generations
• Future-Proof Performance: Supports higher horsepower builds and aftermarket fuel system upgrades