Increase your reliability and performance of the fuel system in your 2011-16 GM 6.6L Duramax. We offer CP4-CP3 conversion kits from Industrial Injection and SS Diesel Motorsport. The SS Diesel Motorsport CP3 conversion kit is built as a drop in replacement for your factory CP4 fuel injection pump. NO tuning required to run this system and the CARB kit is legal in all 50 states. Also, If you are building an off-road application we have combos to help achieve your desired performance needs. The cost of these products are about a 3rd of the cost to repair your vehicle if your problematic factory CP4 pump grenades and takes out your whole fuel system. PROTECT YOURSELF! We have many options so please feel free to call us at 1-800-823-4444 if you have any questions.