The Industrial Injection 436403 CP4 To CP3 Conversion Kit With 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.
This kit includes a stock CP3 pump which is capable of 500+ HP!
Capable Of 500+ HP!
CP4 To CP3 Conversion
Not For Stock Applications - Custom Tuning Required