
Illustrative photo — the delivered item may differ in appearance. Orders are fulfilled by catalog part number (SKU).
Fuel Injector Fuel Supply Tube Cummins 3978031
Ensure optimal fuel delivery and peak engine performance with this high-quality fuel injector fuel supply tube for Cummins engines. Designed for durability and a precise fit, it prevents leaks and maintains consistent fuel pressure.
Description
High-Performance Fuel Injector Fuel Supply Tube for Cummins Engines
The Cummins 3978031 fuel injector fuel supply tube is a critical component designed to deliver fuel under high pressure from the fuel manifold directly to the injector of the first cylinder (#1 cylinder). Engineered to withstand extreme operating pressures and temperatures, this fuel feed line ensures consistent fuel atomization and optimal combustion efficiency, which directly translates to reliable engine performance and improved fuel economy.
Key Features and Benefits
- Precise Fitment: Engineered specifically for Cummins ISB 6.7, ISD 4.5, ISD 6.7, and QSB 6.7 engines, ensuring a secure, leak-free connection.
- Durable Construction: Fabricated from high-grade materials to resist vibration, thermal stress, and high-pressure fuel flow.
- Optimized Combustion: Maintains steady fuel pressure to the #1 cylinder injector, preventing misfires and ensuring smooth engine operation.
- Direct Replacement: Designed to match exact factory specifications for a straightforward installation process.
Engine Compatibility
This fuel injection fuel feed hose is compatible with the following heavy-duty Cummins engine models:
- Cummins ISB 6.7
- Cummins ISD 4.5
- Cummins ISD 6.7
- Cummins QSB 6.7
