LML Duramax CP3 Conversions

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* 50 State LML CP3 conversion kit w/pump – CARB EO #D-756 –  No Tuning Required
* LML CP3 conversion kit w/pump – Competition Use Only – No Tuning Required

S&S Diesel Motorsport, the world leader in common-rail diesel injection has developed a solution for CP4.2 high-pressure pump failures that have plagued the LML Duramax engine. The S&S solution is to remove the problem before it becomes a problem, by replacing the CP4.2 with a tried and true, bulletproof CP3 high pressure fuel pump.

CP4 high pressure pumps are the Achilles heel of the LML Duramax engine because of high failure rates, and commonly taking out the entire, very costly, high-pressure system with it (injectors, rails, lines). S&S Diesel Motorsport offers the only CARB-compliant (EO #D-756) 50 State CP3 conversion available for the LML.  This includes all hardware necessary to replace the troublesome CP4 with a bulletproof CP3, requires no tuning changes, and still maintains factory emissions control equipment. Competition applications are also available as well please call with any questions 717-284-3760. 

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Learn more about CP4 failures and our 50 State solution from Diesel Power

Extra Information

S&S Diesel

warning WARNING: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to