1989–1993 5.9L Cummins Fuel Injectors & Components

Shop fuel injectors and related components for 1989–1993 5.9L Cummins applications. This collection includes stock and performance mechanical injectors, injector sleeves, sealing parts and injector service components.

Injector selection changes across Cummins generations and, in several year ranges, by engine rating or vehicle application. Verify the exact model year and, where relevant, whether the truck is intercooled or non-intercooled.

5 products
1990-1993 5.9 Cummins Injector (W/ Intercooler) - Industrial Injection
1990-1993 5.9 Cummins Injector (W/ Intercooler) $9705
Bosch New 5.9L 1st Gen. Injectors POD (50hp) - Industrial Injection
Bosch New 5.9L 1st Gen. Injectors POD (50hp) $5848
12 Valve Cummins Return Line Washer - Industrial Injection
12 Valve Cummins Return Line Washer - Industrial Injection
12 Valve Cummins Return Line Washer $343
7mm to 9mm Injector Sleeve - Industrial Injection
7mm to 9mm Injector Sleeve - Industrial Injection
7mm to 9mm Injector Sleeve $822
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1989-1998 Cummins 12 Valve Injector Puller $2849

Choosing 1989–1993 5.9L Cummins Fuel Injectors

The 1989–1993 5.9L Cummins is the early 12-valve 6BT platform with mechanical Bosch VE fuel injection. Cummins notes that intercooling was introduced during the 1991 model year, so early and later first-generation trucks are not identical.

This collection includes stock and performance mechanical injectors, injector sleeves, sealing parts and injector service 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.

Verify the exact model year and, where relevant, whether the truck is intercooled or non-intercooled. 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.

Frequently Asked Questions

What fuel-injection system does the 1989–1993 5.9L Cummins use?

The 1989–1993 platform uses mechanical Bosch VE injection.

What should I verify before choosing first-generation 12-valve injectors?

Exact model year and intercooler configuration can matter on first-generation trucks. Decide whether you need a stock replacement or performance injector, then verify the injector specifications and intended application.

Do Cummins remanufactured injectors have a core charge?

Some remanufactured injector listings require a refundable core while new injectors and supporting components may not. Core requirements are product-specific, so check the individual product page before ordering.

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