Product Description
Genuine Cummins
Cummins 4935981 — #1 Fuel Injection Line / Injector Fuel Supply Tube (6.7L)
MPN: 4935981 | Also Known As: injector fuel supply tube, high-pressure fuel line | Cylinder: #1 (front of engine)
Why This Part
- ✓ OE high-pressure line from common-rail to injector #1 for proper sealing and flow.
- ✓ Direct-fit on 2007.5–2018 6.7L ISB Ram applications.
- ✓ Pre-formed steel with correct end forms to eliminate leaks from fatigued fittings.
- ✓ Built to Cummins specs for durability and pressure integrity.
OE Fit Stock Replacement 1 Per Engine (Pos.)
Quick Specs
| Type | Injector fuel supply tube / high-pressure line |
|---|---|
| OE Part # | 4935981 (cyl. #1) |
| Engine | Cummins ISB 6.7L (24V Common-Rail) |
| Qty Required | 1 per cylinder position |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 2007.5–2018 | Ram 6.7L ISB (24V Common-Rail) | Ram 2500/3500 |
Industrial/Off-Highway: Also used on many ISB/QSB 6.7 platforms—always verify by ESN.
Often Paired With
- Other cylinder lines: 4935982 (#2/#3) · 4935974 (#4/#5) · 4935976 (#6)
- Fresh line nuts & clips if original hardware is worn
What’s In The Box
- (1) Genuine Cummins #1 Injector Fuel Supply Tube / Line (4935981)
- No additional fittings or seals included.
Install Tips
- Work clean—keep debris out of open fuel system.
- Hand-start both ends; tighten and torque per Cummins service procedure.
- Do not apply thread sealant/anti-seize to HP connections.
- After install, prime system and check for leaks at idle and under load.
FAQ
WILL THIS FIT MY 6.7L CUMMINS RAM?Yes—direct-fit for most 2007.5–2018 Ram 2500/3500 6.7L ISB applications; confirm by VIN/ESN.
WHICH CYLINDER IS THIS LINE FOR?This is the #1 cylinder line (front of the engine, radiator side).
SHOULD I REPLACE LINES WHEN CHANGING INJECTORS?Best practice is to inspect and replace any line with damaged flare/fittings or evidence of leakage. Many techs replace the affected line whenever an injector is serviced.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins 4935981 built to factory specifications.
WHAT ARE THE COMPANION PART NUMBERS BY CYLINDER?#2/#3: 4935982 | #4/#5: 4935974 | #6: 4935976.
Product Videos
Custom Field
Vehicle Year 2007.5,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018
Vehicle Make DODGE
ENGINE 6.7L
