Product Description
Cummins 3866798 OEM Injector Fuel Supply Line Set – Ram 5.9L 12-Valve (1994–1998) | Bosch P7100
The Cummins 3866798 OEM Injector Fuel Supply Line Set is a genuine Cummins replacement fuel line kit designed for 1994–1998 Dodge Ram 5.9L 12-valve Cummins engines equipped with the Bosch P7100 injection pump. Engineered to deliver precise fuel flow from the P-pump to each injector, this OEM line set ensures proper fuel delivery, injector performance, and long-term reliability.
Manufactured to original Cummins specifications, the 3866798 injector line set is ideal for replacing damaged, corroded, leaking, or improperly modified fuel lines. Whether you're restoring a stock 12-valve Cummins or replacing worn components during an injector or injection pump service, this OEM line set provides factory-quality fitment and performance.
Features
- Genuine Cummins OEM injector fuel supply line set
- Direct replacement for factory injector lines
- Designed for Bosch P7100 injection pump applications
- Precision-bent steel fuel lines for proper routing
- Maintains correct fuel delivery to each injector
- Factory-style fit, finish, and performance
- Helps eliminate leaks caused by damaged fuel lines
- Ideal for stock restoration and maintenance projects
- OEM quality construction for long service life
- Designed to meet original Cummins specifications
Fitment
- 1994 Dodge Ram 2500 5.9L Cummins 12-Valve
- 1995 Dodge Ram 2500 5.9L Cummins 12-Valve
- 1996 Dodge Ram 2500 5.9L Cummins 12-Valve
- 1997 Dodge Ram 2500 5.9L Cummins 12-Valve
- 1998 Dodge Ram 2500 5.9L Cummins 12-Valve
- 1994 Dodge Ram 3500 5.9L Cummins 12-Valve
- 1995 Dodge Ram 3500 5.9L Cummins 12-Valve
- 1996 Dodge Ram 3500 5.9L Cummins 12-Valve
- 1997 Dodge Ram 3500 5.9L Cummins 12-Valve
- 1998 Dodge Ram 3500 5.9L Cummins 12-Valve
- Engines equipped with Bosch P7100 injection pumps
Note: Verify engine serial number and injection pump configuration before ordering. Proper installation procedures and injector torque specifications should always be followed when replacing fuel injector lines.
What's Included
- Cummins 3866798 Injector Fuel Supply Line Set
- Complete Injector Hard Line Assembly Set
- Factory Bent and Formed Fuel Lines
Specifications
- Manufacturer: Cummins
- Part Number: 3866798
- Product Type: Injector Fuel Supply Line Set
- Material: High-Strength Steel Fuel Lines
- Fuel System: Bosch P7100 Injection Pump
- Engine: Cummins 5.9L 12-Valve
- Engine Years: 1994–1998
- Vehicle Application: Dodge Ram 2500 and 3500
- Fuel Delivery: Injection Pump to Fuel Injectors
- Installation Type: Direct OEM Replacement
- Application: Stock Replacement and Engine Restoration
- Condition: New Genuine Cummins Component
Cross Reference Numbers
3866798, Cummins 3866798, 5.9L Injector Line Set, P7100 Injector Lines, Bosch P-Pump Fuel Line Kit, 12-Valve Injector Hard Lines
FAQ
What does the Cummins 3866798 fuel line set include?
This kit includes the injector fuel supply hard lines that route fuel from the Bosch P7100 injection pump to the fuel injectors on 1994–1998 5.9L 12-valve Cummins engines.
Will this fit all 12-valve Cummins engines?
This line set is designed for 1994–1998 Dodge Ram 5.9L 12-valve Cummins engines equipped with the Bosch P7100 injection pump. Verify your application before ordering.
Can damaged injector lines affect engine performance?
Yes. Damaged, bent, cracked, or leaking injector lines can cause fuel delivery issues, poor engine performance, hard starting, excessive smoke, and fuel leaks.
Is this a genuine Cummins part?
Yes. The 3866798 is a genuine Cummins OEM replacement component manufactured to original equipment specifications.
Should injector lines be replaced during injector service?
While not always required, replacing damaged or corroded injector lines during injector or injection pump service can help ensure proper fuel delivery and long-term reliability.
Will this work with aftermarket injectors?
In many cases yes, provided the injectors retain factory-style connections and routing. Always verify compatibility with your specific injector setup.
