Product Description
Genuine Cummins
Cummins 3943775 — #6 Fuel Injection Line (VP44, 5.9L 24V)
MPN: 3943775 | Also Known As: injector fuel supply tube, injection line | Position: Cylinder #6
Why This Part
- ✓ OE line for VP44 5.9L—restores proper high-pressure fuel delivery to cylinder #6.
- ✓ Direct-fit for 1998.5–2002 Ram 5.9L 24V (VP44 pump), no mods.
- ✓ Precision-formed steel to resist vibration-induced cracking/leaks.
- ✓ Genuine Cummins quality and flares for reliable sealing.
OE Fit VP44 24V 1 Per Engine
Quick Specs
| Type | Fuel injection line / injector fuel supply tube |
|---|---|
| OE Part # | 3943775 (Cylinder #6) |
| Engine | 5.9L ISB 24V with VP44 (’98.5–’02) |
| Qty Required | 1 per engine (sold individually) |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 1998.5–2002 | Ram 5.9L ISB 24V (VP44) | Ram 2500/3500 |
Industrial/Off-Highway: ISB/QSB 5.9 Stage 2 variants may use this tube—verify by ESN.
Often Paired With
- Other injector lines (#1–#5): 3943765 (#1), 3943767 (#2), 3943769 (#3), 3943771 (#4), 3943773 (#5)
- Line clamps/retainers (reduce vibration)
- New injector sealing washers if injectors are disturbed
What’s In The Box
- (1) Genuine Cummins #6 Fuel Injection Line (3943775)
Install Tips
- Route exactly like OE; avoid twists/kinks. Start fittings by hand to prevent cross-threading.
- Keep connections surgically clean; cap open lines during service.
- Tighten to factory torque spec per service manual; recheck for leaks after warm-up.
FAQ
WILL THIS FIT MY 1998.5–2002 5.9L 24V (VP44)?Yes—3943775 is the cylinder #6 injection line for VP44-equipped 5.9L 24V trucks (verify by VIN/ESN).
IS THIS GENUINE CUMMINS OR AFTERMARKET?This is a genuine Cummins OE line with factory-correct flares and fittings.
DO I NEED TO REPLACE ALL SIX LINES?Not required, but recommended if age/vibration has affected multiple lines. At minimum, inspect clamps and adjacent lines for wear.
WHAT ELSE SHOULD I REPLACE DURING INSTALL?Replace any worn line clamps/retainers; if injectors are removed, use new sealing washers and follow torque/cleanliness procedures.
WILL THIS FIT COMMON-RAIL (2003+)?No—this line is for VP44 (’98.5–’02) applications. Common-rail engines use different high-pressure lines/rails.
Product Videos
Custom Field
Vehicle Year 1998.5,1999,2000,2001,2002
Vehicle Make DODGE
ENGINE 5.9L
