Cummins ISB 6.7 Parts - Injector Section

Cummins ISB 6.7 Fuel Injectors & Injection Components

The Cummins ISB 6.7L engine relies on a precisely engineered fuel injection system to deliver the performance, efficiency, and emissions control standards it’s known for. Whether installed in marine, industrial, or stationary power applications, the injectors are the heart of the combustion process—controlling the exact quantity and timing of fuel delivery to each cylinder. At Diesel Pro Power, we supply high-quality injectors and related fuel system components designed to restore or enhance engine performance, ensuring smooth operation under even the most demanding conditions.

Injector Kits for Cummins ISB 6.7 Engines

Our Cummins ISB 6.7 injector kits are engineered to meet or exceed OEM specifications, providing a direct replacement solution that maintains factory performance standards. Each kit includes the injector unit along with the seals and hardware needed for a complete installation. Precision manufacturing ensures optimal spray patterns and consistent fuel atomization, which is critical for fuel economy, power output, and compliance with emissions requirements.

Key Benefits:

• Restores lost engine power caused by worn or clogged injectors

• Ensures smooth idle and reduced exhaust smoke

• Improves cold start performance

• Designed for compatibility with specific Control Parts List (CPL) configurations

• Includes all required installation components for a hassle-free replacement

These injector kits are suitable for a range of Cummins medium-duty platforms, but for the ISB 6.7, they deliver the precise metering required to handle higher injection pressures and advanced timing control used in modern electronic fuel systems.

Fuel Rails & Manifolds for Cummins ISB 6.7

The fuel rail (or fuel manifold) plays a critical role in delivering high-pressure fuel from the pump to each injector. On the ISB 6.7, maintaining the correct fuel pressure across all injectors is essential for peak performance and emissions compliance. A damaged or leaking manifold can cause power loss, poor fuel economy, and starting issues.

Our replacement fuel manifolds are built from high-strength materials to withstand high injection pressures and resist corrosion in marine or industrial environments. They are machined to exact tolerances to ensure perfect sealing and consistent fuel distribution.

Features:

• OEM-equivalent fit and finish for direct installation

• Resistant to pitting and internal erosion from high-pressure diesel fuel

• Compatible with factory mounting brackets and sensor ports

• Designed for both marine and industrial ISB 6.7 setups

Why Injector Health Matters for the ISB 6.7

The Cummins ISB 6.7 uses a high-pressure common rail (HPCR) fuel system, which relies heavily on precise injector operation. Even minor injector wear can cause inefficient combustion, leading to reduced fuel efficiency, increased emissions, and potential engine damage over time. Common symptoms of injector problems include:

• Hard starting or rough idle

• Excessive black or white exhaust smoke

• Noticeable drop in power under load

• Increased fuel consumption

• Engine misfire codes

Replacing injectors at the first sign of trouble can prevent costly damage to pistons, cylinder heads, and turbochargers caused by over-fueling or improper combustion.

Complete Injector Replacement Solutions

Diesel Pro Power offers more than just injectors—we provide a complete range of related components to ensure your ISB 6.7 fuel system functions flawlessly:

• Injector seals and O-rings to prevent leaks and maintain pressure integrity

• Fuel connector tubes for consistent, uninterrupted fuel delivery

• High-pressure fuel lines designed to handle the ISB 6.7’s injection pressures

• Fuel pressure relief valves to protect against over-pressurization

• Fuel rail pressure sensors for accurate ECM feedback

By replacing injectors and associated hardware at the same time, you can maximize system reliability and extend service intervals.

Marine & Industrial Application Considerations

While the ISB 6.7 was widely adopted in on-highway trucks, its marine and industrial variants operate in much more demanding conditions. Continuous operation at high load, exposure to saltwater, and extended service intervals all place extra stress on the fuel system. That’s why our injector kits and manifolds are sourced from trusted manufacturers who understand these environments, ensuring long-term durability.

Professional Installation Tips for ISB 6.7 Injectors

For the best results:

1. Always replace injector seals and torque fasteners to factory specifications.

2. Clean the injector bores to remove carbon deposits before installation.

3. Use only clean diesel fuel and change filters regularly to protect new injectors.

4. If replacing one injector, consider replacing the full set to maintain balanced performance.

5. Perform an ECM calibration update if required after installation.