Product Description
The CUMMINS 4003580 OEM P7100 INJECTION PUMP REAR SUPPORT BRACKET is the factory-engineered brace used on 1994–1998 5.9L 12-valve Cummins engines to stabilize the P7100 injection pump and prevent housing stress, timing case flex, and long-term pump wear. This rear support bracket is essential on performance-modified trucks, but even stock engines benefit from restoring proper pump support. If your original brace is missing, cracked, or improperly aligned, this genuine Cummins replacement ensures the durability and precision your P-pump was designed for.
This is a genuine Cummins OEM 4003580 steel support—NOT an aftermarket copy. It mounts between the P7100 injection pump and the engine block, preventing vibration, gear misalignment, and timing case fatigue. Whether you’re rebuilding a 12-valve, swapping pumps, or correcting a missing bracket from a previous repair, this OEM brace restores the structural integrity your fueling system depends on.
Key Features & Benefits
- Genuine Cummins 4003580 OEM P7100 rear support bracket.
- Prevents pump housing stress, timing case flex, and uneven pump loading.
- Critical for stock and performance-built P-pump trucks.
- Restores structural support during timing adjustments and pump service.
- Factory-correct fitment—no drilling, cutting, or modification required.
Fitment
This Cummins OEM bracket fits the following models:
- 1994–1998 Dodge Ram 2500 5.9L 12-Valve Cummins (P7100 injection pump)
- 1994–1998 Dodge Ram 3500 5.9L 12-Valve Cummins (P7100 injection pump)
Engine Platform: 6BT / ISB 5.9L 12-valve
Pump Application: Bosch P7100 mechanical injection pump
Note: Required for proper P-pump stability and gear/shaft alignment.
Cross-Reference (ID Only)
- Cummins 4003580 (this part)
- Cummins 3922492 (related bracket in assembly)
- Bosch P7100 hardware reference (pump support component)
Cross-reference numbers provided for identification only. Always verify by ESN.
Related Genuine Cummins Components
- CUMMINS 3937111 FRONT CRANKSHAFT SEAL SERVICE KIT – 5.9L (1989–2007)
- CUMMINS 3804899 OEM FRONT CRANKSHAFT SEAL – 5.9L/6.7L
- CUMMINS 3920706 OEM TURBO DRAIN EXPANSION PLUG – 5.9L/6.7L
Installation Notes
- Install with the pump and timing case properly aligned.
- Use OEM hardware and torque to Cummins specifications.
- Check for pump vibration or misalignment after installation.
- Recommended any time a P7100 pump is removed or serviced.
Specifications for cummins 4003580
| Specification | Detail |
|---|---|
| Brand | Cummins (Genuine OEM) |
| Part Number | 4003580 |
| Component Type | Injection Pump Rear Support Bracket |
| Engine Compatibility | 1994–1998 5.9L 12-Valve Cummins (6BT, P7100) |
| Material | Formed and machined steel |
| GTIN | GTIN not published by Cummins |
| UPC | UPC not published by Cummins |
| Shipping Weight | Approx. 2.0 lbs |
| Shipping Dimensions | 8 × 6 × 4 in (approx.) |
| Shipping Method | Standard ground / small parcel |
| Cross Reference | Cummins 4003580; Cummins 3922492 (related hardware) |
| E-Codes / Emissions | Not emissions-regulated (mechanical bracket) |
| Prop 65 Warning | This product may contain materials known to the State of California to cause cancer or reproductive harm. For more information visit www.P65Warnings.ca.gov. |
FAQ
IS THE CUMMINS 4003580 BRACKET REQUIRED FOR A P7100 PUMP?
Yes. The rear bracket is critical for stabilizing the P7100 pump. Missing or damaged braces can cause timing case stress, gear misalignment, vibration, and premature pump wear.
WILL THIS FIT ALL 1994–1998 12-VALVE CUMMINS TRUCKS?
Yes—this OEM Cummins 4003580 support bracket fits all 1994–1998 Dodge Ram 2500/3500 5.9L 12-valve trucks equipped with the Bosch P7100 mechanical injection pump.
IS THIS A GENUINE CUMMINS PART OR AFTERMARKET?
This is a 100% genuine Cummins OEM part sourced directly from Cummins distribution—not a reproduction or aftermarket brace.
DO I NEED TO REMOVE THE PUMP TO INSTALL THIS BRACE?
The pump does not always need to be removed, but access varies by truck. Many installers replace this bracket during pump swaps or timing work because it ensures proper alignment.
WHAT OTHER OEM PARTS SHOULD I REPLACE WHEN SERVICING A P7100?
Many owners also refresh sealing components and timing-related hardware such as the 3937111 front crankshaft seal kit , 3804899 front crank seal , and 3920706 turbo drain expansion plug .
