- Part Number: 68503521AA
- Est. Ship Time: Contacts To Confirm Availability
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Fits: 2019-2024 Ram 6.7L Cummins
This is a genuine OEM part from Mopar. It’s the main supply line for the fuel rail (not the individual cylinder injector-to-line) — so this is the core feed line in the fuel-rail/injector system, rather than one of the six separate injector lines. Some early trucks with the CP4 fuel pump (a different configuration) had two supply lines on the fuel rail.
Some trucks have had the CP4 pump vs the CP3 pump, and different rail supply line configurations, you must verify your build/engine configuration. Since this is a high-pressure fuel rail supply line, cleanliness, correct sealing, correct routing, and torque are all critical. Improper installation may cause leaks, pressure loss, or even catastrophic injector/pump failure. This part is often replaced if there’s contamination in the fuel system, or if the system has had damage or failure around the pump/rail.
Mopar: 68503521AA
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