Product Description
The CUMMINS 4935981 OEM #1 FUEL INJECTION LINE (INJECTOR FUEL SUPPLY TUBE) is designed for 2007.5–2018 6.7L Cummins ISB diesel engines. This genuine Cummins high-pressure fuel line delivers fuel from the common rail to the number one injector while maintaining proper sealing, fuel delivery, and OEM fitment.
Use this part when replacing a damaged, leaking, corroded, or contaminated injector supply tube. Proper fuel line condition is critical to maintaining fuel system performance, injector operation, and emissions compliance. Always verify fitment by engine serial number before ordering.
FEATURES
- Genuine Cummins OEM injector fuel supply tube
- Direct-fit replacement for the number one cylinder injector line
- Manufactured to OEM fuel system specifications
- Designed for high-pressure common rail fuel systems
- Helps maintain proper injector fuel delivery and sealing
- Ideal for repair, maintenance, or injector replacement service
FITMENT
- 2007.5–2018 Ram 2500 6.7L Cummins
- 2007.5–2018 Ram 3500 6.7L Cummins
- 2007.5–2018 Ram 4500 6.7L Cummins
- 2007.5–2018 Ram 5500 6.7L Cummins
- Select Cummins ISB 6.7L industrial and commercial applications
WHAT'S INCLUDED
- 1 Cummins 4935981 OEM #1 Fuel Injection Line
CROSS-REFERENCE AND RELATED PRODUCTS
- Cummins 4935981
- Cummins Fuel Connector Tubes
- Cummins Common Rail Fuel System Components
- Cummins Fuel Injectors for 6.7L Applications
SPECIFICATIONS
- Manufacturer: Cummins
- Part Number: 4935981
- Part Type: Fuel Injection Line / Injector Fuel Supply Tube
- Cylinder Position: Number 1
- Engine Compatibility: 6.7L Cummins ISB
- Fitment Years: 2007.5–2018
- Fuel System Type: High-Pressure Common Rail
- Vehicle Application: Ram 2500, 3500, 4500, and 5500
- Condition: New OEM Cummins
- Installation Type: Direct Replacement
FAQ
Will this fuel injection line fit my truck?
This line fits many 2007.5–2018 6.7L Cummins applications. Always verify fitment by engine serial number before ordering.
What cylinder does this fuel line serve?
This fuel injection line supplies fuel to the number one injector position.
Is this a genuine Cummins fuel line?
Yes. Cummins 4935981 is a genuine OEM high-pressure injector fuel supply tube.
Should fuel lines be replaced when replacing injectors?
Cummins commonly recommends inspecting and replacing damaged or improperly sealed fuel lines whenever injector service is performed.
What are the signs of a failed fuel injection line?
Symptoms may include fuel leaks, rough operation, low fuel rail performance, fuel odor, hard starts, or visible damage to the line.
Do I need any related parts?
Inspect the injector connector tube, fuel injector, rail fittings, and surrounding fuel system components during installation and replace worn parts as necessary.
