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and there's no better option than this drop-in replacement from CSF
it is imperative that you replace the factory transducer at the same time
Axle Ratio
progressive leaf springs
Without it
Industrial Injection 436403 CP4 to CP3 Conversion Kit (Tuning Required) 11-16 6.6L GM Duramax LML DDP COMPGSK and there's no better optionWith the release of the LML Duramax in 2011, GM made the switch from the reputable CP3 injection pump to the lower output CP4 pump, simply because they deemed it was Is good enough for you and your truck? We've seen numerous failures of the CP4 on stock trucks, let alone even slightly modified trucks that chew them up and spit them out. Industrial Injection has this complete conversion kit that delivers everything you need to swap out your failure
