2003-2009 Cummins Ram 5.9L High Pressure Fuel Line 3957079 5086870Aa CP3 To Rail

High Pressure Fuel Line for Cummins

This high pressure fuel line, with OEM cross-reference numbers 3957079 and 5086870AA, connects the CP3 pump to the fuel rail on 2003-2009 Cummins 5.9L Ram engines.

Overview

This high pressure fuel line is a direct replacement for the line that routes diesel from the CP3 injection pump to the common rail on 2003-2009 Cummins 5.9L Ram trucks. It is engineered to withstand the extreme pressures generated by the CP3 system, ensuring a reliable fuel supply to the injectors. This line is essential for maintaining proper fuel pressure and engine performance.

Built For Performance

• Constructed from high-grade steel to handle the high pressures of the CP3 fuel system
• Precision-formed for a correct fit between the CP3 pump and the fuel rail
• Direct replacement for OEM part numbers 3957079 and 5086870AA
• Rigorous testing ensures leak-proof operation under demanding conditions
• Maintains optimal fuel delivery for consistent engine power

Fits These Machines

• for 2003-2009 Dodge Ram 2500 with Cummins 5.9L
• for 2003-2009 Dodge Ram 3500 with Cummins 5.9L

On-The-Job Use

• For replacing a worn or leaking fuel line on high-mileage work trucks
• For use during CP3 pump or fuel rail replacement to ensure a secure connection
• For maintaining fuel pressure in vehicles used for towing and hauling

Specs At A Glance

Good To Know

Q: What is the purpose of this fuel line? A: This line carries high-pressure fuel from the CP3 injection pump to the fuel rail, which is critical for engine operation. A failure here will cause a major loss of fuel pressure and the engine will not run.

Q: Is this an OEM part? A: This is an aftermarket replacement part designed to match the fit and function of the original Cummins line, identified by part numbers 3957079 and 5086870AA.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.