Product Description
The CUMMINS 4935577 OEM TURBO OIL FEED SUPPLY LINE delivers factory-correct, high-pressure lubrication to the turbocharger on 2003–2018 5.9L and 6.7L ISB engines. A restricted, leaking, or cracked feed line is one of the most common causes of premature turbo failure. Replacing aftermarket or worn lines with a genuine Cummins 4935577 ensures proper oil volume, fast spool-up, and long turbocharger life.
Designed to handle extreme diesel heat cycles, vibration, and oil pressure, this OE steel-braided line uses the correct banjo fittings and sealing surfaces engineered by Cummins. Whether installing a new turbo, repairing an oil leak, or eliminating low-oil-flow trouble codes, this line restores OEM reliability and lubrication performance.
Key Features & Benefits
- Genuine Cummins 4935577 oil feed line — NOT aftermarket.
- Restores proper turbo lubrication and protects against premature turbo failure.
- Correct OE fittings, bends, and oil passages for the ISB platform.
- Heat-resistant and vibration-resistant construction for long service life.
- Required whenever replacing or upgrading the turbocharger.
Fitment
This genuine Cummins turbo oil feed line fits:
- 2003–2007 Dodge Ram 2500/3500 5.9L Cummins ISB
- 2007.5–2018 Dodge Ram 2500/3500 6.7L Cummins ISB
- Cab & Chassis variants also supported
Turbo Position: Standard single-turbo ISB configuration.
Always confirm by VIN or ESN for exact compatibility.
Cross-Reference (ID Only)
- Cummins 4935577 – This product
- Cummins supersession references: 4336158, 5264230 (varies by ESN)
Cross-reference numbers are for identification only. Verify by ESN if unsure.
Related Genuine Cummins Components
CPP Diesel recommends pairing this line with other genuine Cummins components:
- CUMMINS 3804899 OEM FRONT CRANKSHAFT SEAL – 5.9L/6.7L
- CUMMINS 3920706 OEM EXPANSION PLUG (TURBO DRAIN) – 5.9L/6.7L
- CUMMINS 3937111 FRONT CRANKSHAFT SEAL SERVICE KIT – 5.9L
- CUMMINS 3946495 OEM HARMONIC BALANCER DOWEL PIN – 5.9L/6.7L
Installation Notes
- Replace sealing washers when installing on banjo-style ports.
- Prime turbocharger with clean engine oil prior to first start.
- Never reuse damaged or kinked oil lines — always replace.
- Verify no obstructions in block or turbo feed ports.
Specifications for cummins 4935577
| Specification | Detail |
|---|---|
| Brand | Cummins (OEM Genuine) |
| Part Number | 4935577 |
| Engine Compatibility | 2003–2018 5.9L & 6.7L ISB Cummins |
| Construction | Steel tube with OEM-spec banjo fittings |
| UPC | Not published by Cummins |
| GTIN | Not published by Cummins |
| Shipping Weight | Approx. 1 lb |
| Shipping Dimensions | 16 × 4 × 2 in (approx.) |
| Cross Reference | 4336158, 5264230 (ID only) |
| E-Codes | OE emissions-approved component |
| Prop 65 Warning | Yes – This product can expose you to chemicals known to the State of California to cause cancer and reproductive harm. Learn more. |
FAQ
WILL THIS CUMMINS 4935577 OIL FEED LINE FIT MY 5.9L OR 6.7L CUMMINS?
Yes — it fits most 2003–2018 ISB engines, including 5.9L and 6.7L Ram 2500/3500 applications. When in doubt, verify by ESN.
SHOULD I REPLACE THE OIL FEED LINE WHEN INSTALLING A NEW TURBO?
Yes. CPP Diesel strongly recommends replacing the oil feed line when installing a new turbo to prevent contamination or starvation issues.
IS THIS A GENUINE CUMMINS COMPONENT?
Yes — this is a factory Cummins 4935577 OEM line, not an aftermarket version.
DO I NEED NEW WASHERS OR SEALS?
Yes. Banjo fittings require new sealing washers to guarantee leak-free installation.
