2872331 5579409 5579409PX 2872331PX Fuel Injector Kit with Tubes Compatible with Cummins ISC8.3 ISL8.9 XPI – Set of 6

Set of six new XAVORNIK aftermarket XPI fuel injectors with six matching high-pressure connector tubes for selected Cummins ISC8.3 and ISL8.9/ISL9 diesel engine configurations.

This complete six-cylinder service set includes six matching fuel injectors and six connector tubes. It is intended for engines using the confirmed XPI fuel system and matching original injector configuration.

Important: Engine family and displacement alone do not confirm compatibility. Cummins ISC and ISL engines were produced with different fuel systems, emissions configurations, CPLs and injector calibrations. Verify the original injector number, Engine Serial Number and CPL before ordering.

Product Details

Reference Numbers

• 2872331
• 2872331PX
• 5579409
• 5579409PX

These numbers are provided for product identification and cross-reference searches. The PX numbers are associated with remanufactured reference products. This listing is for a new XAVORNIK aftermarket kit and is not a Cummins ReCon product.

Engine Applications

• Selected Cummins ISC8.3 XPI diesel engines
• Selected Cummins ISL8.9 XPI diesel engines
• Selected Cummins ISL9 XPI diesel engines
• Selected trucks, buses, motorhomes, industrial equipment and other applications equipped with the confirmed engine and injector configuration

This listing does not claim compatibility with every ISC, ISL or ISL9 engine. Non-XPI fuel systems and engines using different injector numbers are not confirmed applications.

Verify Before Ordering

Please provide the following information before purchase:

• Original injector part number
• Engine Serial Number (ESN)
• Critical Parts List number (CPL)
• Engine model and equipment information
• Clear photos of the original injector body and electrical connector
• Clear photos of the original connector tube and threaded ends

A matching engine name, vehicle model or production year alone is not sufficient to confirm compatibility.

Package Contents

• 6 × New Aftermarket XPI Fuel Injectors
• 6 × Matching High-Pressure Connector Tubes

Additional seals, washers, clamps, tools or fuel-system components are included only when specifically shown in the product images.

Installation Information

• Professional installation by a qualified diesel technician is strongly recommended.
• Do not reuse old connector tubes when the replacement tubes supplied with this kit are applicable.
• Inspect the fuel tank, filters, high-pressure pump, rail and fuel lines for water, dirt or metal contamination.
• Clean the injector bore and surrounding area before installation.
• Follow the applicable engine service manual for installation sequence, torque values and fuel-system priming.
• Injector calibration or ECM procedures vary by engine configuration. Follow the applicable service procedure for the confirmed ESN and CPL.

Failure to correct fuel contamination, pump damage or installation problems may cause repeated injector failure and is not considered a product defect.

Frequently Asked Questions

How many injectors are included?
The package contains six matching fuel injectors and six matching connector tubes.

Does this kit fit every Cummins ISC or ISL engine?
No. It is intended only for selected ISC8.3 and ISL8.9/ISL9 XPI configurations using the confirmed original injector number.

Are 2872331PX and 5579409PX new aftermarket numbers?
They are included as cross-reference search numbers. This product is a new XAVORNIK aftermarket kit, not a Cummins ReCon injector kit.

Is injector programming required?
Calibration and ECM procedures vary by engine configuration. The installer should follow the service information applicable to the engine ESN and CPL.

Is this a genuine Cummins product?
No. This is a new XAVORNIK aftermarket replacement product. Manufacturer names and reference numbers are used only to identify compatibility.