S&S Diesel CP4 to CP3 Conversion Kit (Tuning Required)

For 2011-2016 GM 6.6L Duramax LML

S&S Diesel LML-CP3-TUNING-REQ Conversion Kit is designed to replace the CP4 pump with a reliable CP3 pump, improving fuel system durability for high-performance applications. This kit requires tuning adjustments to ensure optimal performance. It offers increased fuel reliability and is ideal for modified Duramax trucks seeking better long-term fuel system stability.