Product Description
Genuine Cummins
Cummins 3943773 — #5 Cylinder Fuel Injection Line (1998.5–2002 5.9L 24V)
MPN: 3943773 | Also Known As: injector fuel supply tube, injection line #5 | Platform: 5.9L ISB 24V (VP44)
Why This Part
- ✓ OE hard line for precise fuel delivery to cylinder #5.
- ✓ Direct-fit for 1998.5–2002 Ram 5.9L ISB 24V (VP44).
- ✓ Replaces cracked, leaking, or contaminated lines; restores reliability.
- ✓ Genuine Cummins quality and geometry.
OE Fit Stock Replacement 1 Per Engine (per cylinder)
Quick Specs
| Type | High-pressure injector fuel line (#5) |
|---|---|
| OE Part # | 3943773 |
| Qty Required | One per cylinder position (#5) |
| Related Lines | #1: 3943765 · #2: 3943767 · #3: 3943769 · #4: 3943771 · #6: 3943775 |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 1998.5–2002 | Ram 5.9L ISB 24V (VP44) | Ram 2500/3500 |
Industrial/Off-Highway: Used primarily on Stage 2 ISB/QSB 5.9 applications—always confirm by ESN.
Often Paired With
- Companion injector lines: #1 3943765, #2 3943767, #3 3943769, #4 3943771, #6 3943775
- Line clamps/retainers and hardware
- New injectors or sealing washers if servicing the full set
What’s In The Box
- (1) Genuine Cummins Fuel Injection Line — Cylinder #5 (3943773)
- Clamps/hardware sold separately.
Install Tips
- Clean seating surfaces; avoid kinks. Start fittings by hand to prevent cross-threading.
- Tighten to factory torque; recheck for leaks after initial run-in.
- If contamination was present, flush system and consider replacing the full set.
FAQ
WILL THIS FIT MY 1998.5–2002 5.9L 24V RAM?Yes—this #5 injector line is a direct-fit OE replacement for 1998.5–2002 5.9L ISB 24V (VP44) Ram 2500/3500.
WHICH CYLINDER IS THIS FOR?This is the #5 cylinder line. See “Quick Specs” for the matching #1–#6 part numbers.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins 3943773 for proper geometry and sealing.
DO I NEED ANYTHING ELSE TO INSTALL IT?We recommend checking/refreshing line clamps/retainers and inspecting injectors/fittings for damage or contamination.
SHOULD I REPLACE ALL SIX LINES?If one line failed due to age or corrosion, replacing all six at once is best practice to restore reliability and reduce repeat labor.
Product Videos
Custom Field
Vehicle Year 1998.5,1999,2000,2001,2002
Vehicle Make DODGE
ENGINE 5.9L
