2011-2016 GM 6.6L DURAMAX LML (CUSTOM TUNING REQUIRED)
The Industrial Injection 436402 CP4 To CP3 Conversion Kit (Without Pump) is a sure way to increase reliability and performance in the fuel system of your 2011-2016 GM 6.6L Duramax LML. Built as a replacement for your factory CP4, the CP3 Conversion Kit eliminates the CP4 and uses the more reliable CP3 Pump.
Proven reliability! The factory installed CP4 has known failure issues that cannot be remedied. When these issues occur, they can cause damage to major components of your fuel system. The CP3 fuel pump has been proven to provide longevity and reliable performance.
Hardware For CP4 To CP3 Conversion
Not For Stock Applications - Custom Tuning Required
Tech Note: This is a hardware kit to allow you to convert your CP4 to a CP3. You must already have your own LBZ CP3 Pump to use this kit. Custom tuning required.