Cummins ISX High Pressure Fuel Pump | CM2250, CM2350, CM2450 | Fuel Lines Up - 4359489R

High Pressure Fuel Pump – Fuel Lines Up - Cummins ISX Single Cam (CM2250 / CM2350 / CM2450)

Model Years 2011–2016 Cummins ISX / ISX15 | Premium Remanufactured HPFP Unit

If you’re chasing reliable fuel pressure, consistent rail delivery, and long-term durability, this remanufactured high pressure fuel pump for Cummins ISX Single Cam engines is the correct solution for CM2250 and CM2350 applications.

Each unit is professionally remanufactured to OEM specifications, fully tested, and built to handle the extreme demands of modern high-pressure common rail fuel systems. This is a direct-fit replacement designed to restore proper fuel pressure, drivability, and engine performance without modification.

 Applications

• Cummins ISX Single Cam
• CM2250, CM2350, CM2450
• Model Years: 2011–2016
• Highway, vocational, and heavy-duty on-road use

Why Replace the High Pressure Fuel Pump?

A failing HPFP can cause:

• Hard starts or no-start conditions
• Low rail pressure faults
• Loss of power under load
• Poor throttle response
• Check engine lights and derates

Replacing the pump with a properly remanufactured, tested unit restores correct fuel delivery and protects downstream components like injectors and the fuel rail.

Remanufacturing & Quality Standards

This is not a cleaned-up take-off.

Each pump is:

• Fully disassembled and inspected
• Worn components replaced with OEM-grade parts
• Reassembled to factory tolerances
• Pressure-tested and validated
• Final-inspected for leak-down and performance

Built for reliability in high-pressure, high-heat ISX environments.

Direct Replacement For Part Numbers

This fuel pump directly replaces the following Cummins part numbers:

4359487
4307049
4307049PX
4307049RX
4307700
4307700NX
4359489
4359489NX
4359489PX
5491784
5491784PX

If your existing pump matches any of the above numbers, this unit is a direct fit.

What’s Included

• (1) Remanufactured High Pressure Fuel Pump
• Professionally packaged for safe shipment

(Gaskets, seals, & installation hardware included as photed)

Installation Notes

• Proper fuel system cleanliness is critical
• Prime fuel system before initial startup
• Verify rail pressure after installation
• Recommended to inspect fuel filters and lines during replacement

Improper installation or contamination can damage any high-pressure fuel pump.

Ideal For

• Fleet maintenance & rebuilds
• Owner-operators fixing low fuel pressure issues
• Shops needing a reliable CM2250 / CM2350 / CM2450 replacement
• Preventative maintenance during engine service