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The Industrial Injection CP4-to-CP3 Conversion Kit is specified for 2011–2015 GM Duramax 6.6L LML engines and includes a 42% over SHO pump. Intended to replace the CP4 system with a CP3-style setup, the kit is offered for users seeking a direct mechanical conversion tailored to that Duramax generation. It’s presented as a model-specific pump upgrade and conversion package for compatible LML engines.
Industrial Injection 11-15 GM Duramax 6.6L LML CP4 to CP3 Conversion Kit w/ 42% Over SHO Pump
