2017–2023 GM 6.6L Duramax L5P HP4 to DCR Fuel Pump Conversion KitWhen youre repairing a failed high pressure pump or upgrading for long term confidence, this HP4 to DCR fuel pump conversion kit is built specifically for the 20172023 GM 6. 6L Duramax L5P. It replaces the factory installed HP4 high pressure fuel pump with a DCR fuel pump and includes the fuel tubes required to complete the swap cleanly and correctly. The result is a purpose built, OEM style conversion that supports consistent high pressure common
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