2003–2004 5.9L Cummins Fuel Injectors & Components

Model year 2003 marked the pickup 5.9L Cummins transition to high-pressure common-rail fuel injection. Industrial Injection separates 2003–2004 from the later 2004.5–2007 group because several fuel and air-system applications change at that break.

This collection includes new, remanufactured and performance injectors plus nozzles, connector tubes, fuel rails, high-pressure lines, harness parts and rail-pressure components. Some listings are complete injectors while others are nozzles, connector tubes, rails, lines, seals or installation-related components. Use the product title and specifications to confirm exactly what is included.

Treat 2003–2004 separately from 2004.5–2007 and verify the exact model year and current fuel or turbo component number. Performance injectors should be considered with pump capacity, turbocharger airflow, tuning and intended use rather than selected by horsepower rating alone.

Related Cummins collections: Engines & Engine Parts, Injection Pumps & Fuel Supply, Turbochargers & Turbo Parts.