Product Description
Genuine Cummins
Cummins 3943765 — #1 Fuel Injection Line (VP44 to Injector) for 5.9L 24-Valve
MPN: 3943765 | Also Known As: injector feed line, injector tube, high-pressure line | Cylinder: #1
Why This Part
- ✓ OE-formed high-pressure line from VP44 pump to cylinder #1 injector.
- ✓ Direct-fit for 1998.5–2002 Ram 5.9L 24V (VP44).
- ✓ Correct radii & flare geometry to minimize stress and prevent leaks.
- ✓ Genuine Cummins quality for long service life.
OE Fit High Pressure 1 Per Cylinder
Quick Specs
| Type | High-pressure fuel injection line (VP44 → Injector) |
|---|---|
| OE Part # | 3943765 (Cylinder #1) |
| Qty Required | 1 per cylinder (this listing is for #1 only) |
| Platform | ISB 5.9L 24V (VP44), Ram 2500/3500 |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 1998.5–2002 | 5.9L ISB 24V (VP44) | Ram 2500/3500 |
Notes: #1 cylinder line. For other cylinders use the matching OE numbers (see “Often Paired With”). Always verify by VIN/ESN.
Often Paired With
- #2–#6 Lines: 3943767 (#2), 3943769 (#3), 3943771 (#4), 3943773 (#5), 3943775 (#6)
- Line clamps & retainers (replace if damaged or missing)
- Injector sealing hardware as required after service
What’s In The Box
- (1) Genuine Cummins High-Pressure Injection Line — Cylinder #1 (3943765)
- Other cylinder lines and hardware sold separately.
Install Tips
- Keep bends unstressed; do not “tweak” the line. Hand-start nuts to prevent cross-threading.
- Torque to factory spec; recheck for leaks after initial run-in.
- If a line cracked, inspect clamps and adjacent lines for fatigue.
FAQ
WILL THIS FIT MY 1998.5–2002 5.9L 24-VALVE?Yes—this is the OE #1 cylinder line for 1998.5–2002 Ram 5.9L 24V (VP44). Confirm by VIN/ESN.
IS THIS THE LINE FROM THE VP44 PUMP TO THE INJECTOR?Correct—3943765 is the high-pressure feed line from the VP44 injection pump to the #1 injector.
WHAT ARE THE MATCHING PART NUMBERS FOR OTHER CYLINDERS?#2: 3943767, #3: 3943769, #4: 3943771, #5: 3943773, #6: 3943775.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins component with correct flare geometry and bends.
CAN I RE-BEND OR STRAIGHTEN A FUEL LINE?Not recommended. Re-bending can cause stress fractures and leaks. Replace with the correct formed line.
Product Videos
Custom Field
Vehicle Year 1998.5,1999,2000,2001,2002
Vehicle Make DODGE
ENGINE 5.9L
