GM 6.6 Duramax HP4 to DCR Pump Conversion Kit | 608990 | 2017-2022 GM Duramax 6.6L LP5

Upgrade the reliability and performance of your 2017–2022 GM Duramax with the Pure Power 608990 HP4 to DCR Conversion Fuel Pump Kit. Manufactured by PurePower, a Stanadyne company, this kit replaces the factory-installed HP4 pump with the robust and highly reliable DCR (Diesel Common Rail) pump. Built to meet and exceed OEM standards, the DCR pump is 100% end-of-line tested for peak performance and leak-free operation.

Designed specifically for the 6.6L L5P Duramax engine, this conversion kit includes the DCR pump along with all necessary high-pressure and low-pressure fuel tubes for a direct installation. Whether you’re maintaining your daily driver or preparing your truck for heavy towing, the DCR conversion provides improved durability, reliability, and long-term peace of mind.

• Direct replacement for factory-installed Denso HP4 fuel pump
• DCR design reduces risk of catastrophic fuel system failure
• 100% tested for leaks and optimal pressure performance
• Built in ISO 9001:2015 certified facility in the USA
• Supports consistent high-pressure common rail operation
• Longer service life under heavy towing or tuned applications
• Includes supply, return, and high-pressure fuel tubes

• (1) DCR Fuel Pump
• (1) Fuel Tube – Low Pressure Supply
• (1) Fuel Tube – Low Pressure Return
• (1) Fuel Tube – High Pressure Rail
• (1) Fuel Tube – High Pressure Pump
• (1) Supply Hold Down Bolt