Product Description
Cummins 3946440 — Fuel Line Bracket / Tube Brace (ISB 5.9L)
MPN: 3946440 | Also Known As: tube brace, fuel line bracket, hose support bracket | Function: Secures VP44 injection pump fuel lines at the intake plenum
Why This Part
- ✓ OE bracket that stabilizes injection pump fuel lines to prevent vibration & chafe.
- ✓ Direct-fit for 1998.5–2002 Ram 5.9L 24-valve (VP44).
- ✓ Restores factory line routing on the intake plenum.
- ✓ Durable steel construction to handle heat and vibration.
Quick Specs
| Type | Fuel line support bracket / tube brace |
|---|---|
| OE Part # | 3946440 |
| Location | Top of intake plenum; supports lines from VP44 injection pump |
| Qty Required | 1 per engine (sold individually) |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 1998.5–2002 | Ram 5.9L ISB 24-Valve (VP44) | Ram 2500/3500 |
Industrial/Off-Highway: Used primarily on Stage/Tier 2 ISB/QSB 5.9 applications—verify by ESN before ordering.
Often Paired With
- VP44 injection pump mounting/isolators (as needed)
- Replacement line clamps & hardware for the bracket
What’s In The Box
- (1) Genuine Cummins Fuel Line Bracket / Tube Brace (3946440)
- Mounting hardware sold separately.
Install Tips
- Route fuel lines per factory diagram; ensure no contact points with sharp edges.
- Tighten fasteners to spec; recheck after first heat cycle.
- Inspect for vibration/chafe during idle and light rev before road test.
FAQ
WILL THIS FIT MY 1998.5–2002 24-VALVE 5.9L RAM?Yes—this bracket supports the VP44 pump fuel lines on 1998.5–2002 5.9L ISB 24-valve Ram 2500/3500 (verify by VIN/ESN).
IS THIS THE BRACKET ON TOP OF THE INTAKE PLENUM?Correct—this OE part secures the lines leaving the VP44 injection pump on the intake plenum area for proper routing and support.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins 3946440. Beware of non-genuine brackets with poor fitment.
DOES IT INCLUDE CLAMPS OR BOLTS?Hardware is typically sold separately. Inspect and replace any worn clamps or fasteners during installation.
WILL THIS FIT 2003+ COMMON-RAIL TRUCKS?No—this listing targets VP44 (1998.5–2002). Common-rail engines use different brackets/hardware.
