Product Description
Cummins 4935974, 6.7L ISB fuel injection line, injector fuel supply tube, OEM Cummins fuel line, Dodge Ram 6.7 Cummins 2007.5-2018, Cummins high-pressure fuel line
The OEM Cummins 4935974 #4/#5 Fuel Injection Line — also known as the Injector Fuel Supply Tube — is engineered to factory specs for 2007.5–2018 6.7 L ISB (24-valve common-rail) engines, delivering precise high-pressure fuel from the rail to the injector for cylinders #4 or #5 only. Built for strength and a direct fit, this line withstands intense heat, vibration, and pressure inherent to modern diesel fuel systems. Whether you’re replacing a cracked or leaking #4/#5 line — or performing injector service — this genuine Cummins line restores proper fuel delivery and ensures engine reliability.
This is an OEM high-pressure supply tube designed for exact rail-to-injector sealing. It’s a direct-fit replacement for the 2007.5–2018 6.7 L ISB engines (cylinder #4 or #5 only). The updated design helps prevent the cracking and leaks known to plague earlier lines. Installation should be done per Cummins torque specs and include a post-install rail-pressure leak test to guarantee no seepage at either end.
**Fitment & Application**
• 2007.5–2018 Dodge / Ram with 6.7 L Cummins ISB engine
• Positions: Cylinder #4 or #5 only (order one line per affected cylinder)
• For EPA13 6.7 L ISB/QSB diesel engines. Always verify by ESN/VIN before ordering.
**What’s in the Box**
(1) Genuine Cummins Injector Fuel Supply Tube (part # 4935974).
Hardware (clamps, seals) not included — reuse factory hardware if in good shape or replace as needed.
Sold individually — order one per line (per cylinder #4 or #5).
FAQ
WILL THIS FIT MY 2007.5–2018 6.7L CUMMINS RAM? Yes — 4935974 is the OEM high-pressure line for cylinder #4 or #5 on 2007.5–2018 6.7 L ISB engines (verify by ESN/VIN).
WHICH CYLINDERS DOES 4935974 COVER? This part is position-specific: it covers only cylinder #4 or #5 (not both). Order one line per cylinder.
DO I NEED NEW SEALS OR WASHERS? No separate seals are provided — the line uses factory flare/seat interfaces. When reinstalling, ensure the seating surfaces are clean and undamaged to maintain leak-free operation.
IS THIS A GENUINE CUMMINS PART? Yes — this is the genuine OEM injector fuel supply tube manufactured by Cummins, not an aftermarket copy.
WILL THIS FIT 2019+ TRUCKS? Not typically. 2019 and newer 6.7 L Cummins may use different fuel-line geometry — always verify fitment by VIN/ESN before ordering.
| Specifications for cummins 4935974 | |
|---|---|
| Part Number | 4935974 |
| Description | Injector Fuel Supply Tube / High-Pressure Fuel Injection Line for cylinders #4 or #5 (6.7 L ISB) |
| Fitment | 2007.5–2018 6.7 L Cummins ISB / EPA13 diesel engines (cyl #4 or #5 only) |
| Quantity Required | 1 per cylinder (#4 or #5) when replacing |
| Package Dimensions (L×W×H) | 6.0″ × 0.5″ × 0.5″ |
| Package Weight | ≈ 0.38 lbs |
| Warranty | 12-month / 100,000-mile (per Cummins Global Warranty for new parts) |
| Cross Reference / Related Lines | #1 line: 4935981, #2/#3 lines: 4935982, #6 line: 4935976 — when servicing multiple cylinders, check all fuel line integrity. |
| WARNING (Prop 65) | May expose you to chemicals including toluene and/or benzene — see P65Warnings.ca.gov for more information. |
| GTIN / UPC | — (not publicly listed) |
