Fleece Performance 11-16 GM 2500/3500 Duramax LML CP3 Conversion Hardware Kit w/o Pump

The Fleece Performance 11-16 GM 2500/3500 Duramax LML CP3 Conversion Hardware Kit is a high-quality upgrade designed to replace the factory CP4 fuel system with a more reliable CP3 unit. This kit includes OEM-grade components such as a new Bosch CP3, molded fuel feed and return hoses, high-flow fuel fittings, and a valley feed line to support aftermarket lift pumps and filters. It enhances fueling capability and overall reliability by addressing the known weaknesses of the CP4 system, which has been associated with costly failures. The kit features preformed fuel lines, high-flow fittings, and a mounting adapter, providing a comprehensive solution for Duramax owners seeking improved performance and durability.

Designed for 2011-2016 LML Duramax trucks, this hardware kit is a direct replacement for the factory fuel system components. It is suitable for use on vehicles equipped with the 6.6L Duramax engine, primarily for street and towing applications where increased reliability is desired. The kit does not include the CP3 injection pump and requires no FCA regulator table adjustments when converting from a CP4 to a stock CP3. Installation involves replacing existing fuel system components with the included OEM-quality parts, making it ideal for maintenance, upgrades, or preventative measures to avoid costly fuel system failures.