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The Derringer is meticulously calibrated and extensively tested to properly modulate power during shifting
Designed for ease of use
Without it
it is imperative that you replace the factory transducer at the same time
Industrial Injection 436403 CP4 to CP3 Conversion Kit (Tuning Required) 11-16 6.6L GM Duramax LML DDP COMPGSK The Derringer is meticulously calibratedWith 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
