Product Description
Genuine Cummins
Cummins 4988806 — Injector Fuel Supply Tube / Fuel Injection Line (#6)
MPN: 4988806 | Also Known As: fuel injection line, high-pressure injector line, injector fuel supply tube | Position: Cylinder #6 | Cross-Refs: 3957146 (ID only)
Why This Part
- ✓ OE high-pressure line for accurate injector fueling and sealing.
- ✓ Direct-fit for 2003–2007 Ram 5.9L ISB (common-rail) — cylinder #6.
- ✓ Precisely formed steel tube resists vibration-induced fatigue and leaks.
- ✓ Built to Cummins specs for durability and long service life.
OE Fit Common-Rail #6 Cylinder
Quick Specs
| Type | Injector fuel supply tube / high-pressure injection line |
|---|---|
| OE Part # | 4988806 (cross-ref: 3957146) |
| Qty Required | 1 per cylinder position (this SKU is #6) |
| Notes | Do not bend/reshape; torque fittings to factory spec; keep all connections surgically clean. |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 2003–2007 | Ram 5.9L ISB (24V Common-Rail) | Ram 2500/3500 |
Industrial/Off-Highway: Used primarily on Tier 3 ISB/QSB 5.9L; verify by ESN before ordering.
Often Paired With
- Matched injector (cyl #6) and connector tube if removed during service
- Other rail-to-injector lines (#1–#5) if refreshing the full set
- Fuel filter (fresh filter after any fuel system work)
What’s In The Box
- (1) Genuine Cummins Injector Fuel Supply Tube / Injection Line #6 (4988806)
- Clamps/hardware reused unless damaged (inspect and replace as needed).
Install Tips
- Work spotlessly clean; cap open lines to prevent contamination.
- Route exactly as OE; do not pre-load or twist the tube.
- Tighten to factory torque; after first run-in, recheck for leaks.
FAQ
WILL THIS FIT MY 2003–2007 5.9L CUMMINS RAM?Yes—this is the OE injector fuel supply tube for cylinder #6 on 2003–2007 5.9L ISB common-rail Ram 2500/3500 (confirm by VIN/ESN).
WHAT CYLINDER IS THIS FOR?This SKU is for cylinder #6. Lines for cylinders #1–#5 are sold separately.
IS THIS A HIGH-PRESSURE COMMON-RAIL LINE?Yes—this OE steel tube carries high-pressure fuel from the rail to the injector. Keep all sealing surfaces perfectly clean.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins 4988806 for proper fit and durability.
WHAT’S THE CROSS-REFERENCE?Common identification cross-reference: 3957146. Order by 4988806 to ensure the correct #6 line.
Product Videos
Custom Field
Vehicle Year 2003,2004,2005,2006,2007
Vehicle Make DODGE
ENGINE 5.9L
