Product Description
Turn your early common-rail 5.9L into a track-ready animal. The Industrial Injection 0986435503SE-R4 injector set is a 130% over ("Race 4") upgrade engineered for the 2003–2004 Dodge Ram 2500/3500 5.9L Cummins 24V (early CR, 305 HP). These injectors are remanufactured on Bosch equipment, flow-matched as a set, and deliver ~55 LPM of fuel—good for about +250 HP when paired with the right air and fuel supply.
Key Features
- R4 sizing: ~130% over / ~55 LPM flow (high-performance use)
- Matched set for consistent cylinder-to-cylinder fueling
- OEM-level calibration and testing on Bosch benches
- 1-year, unlimited-mile manufacturer warranty
Fitment
- Make/Model: Dodge Ram 2500/3500
- Engine: 5.9L Cummins 24-Valve (Common Rail)
- Years: 2003–2004 (Early 5.9 CR, 305 HP)
- Notes: Designed for high-flow builds; tuning and supporting mods required.
Recommended Supporting Parts
- High-flow CP3 (10–14mm) or dual CP3: 03–07 CUMMINS 5.9L CP3 PUMPS
- Stock-replacement CP3 options: STOCK REPLACEMENT CP3 HIGH PRESSURE FUEL PUMPS
- New connector/feed tubes (strongly recommended on injector install): CONNECTOR / FEED TUBES
- Related 5.9 CR injectors & install kits: 5.9L CUMMINS CR INJECTORS & KITS
- Category overview: 03–07 CUMMINS 5.9L INJECTORS CATEGORY
Specifications
| Manufacturer | Industrial Injection |
|---|---|
| Part Number | 0986435503SE-R4 |
| Sizing | R4 — ~130% over |
| Approx. Flow | ~55 LPM (set) |
| Rated Power Potential | ~+250 HP with proper air/fuel support |
| Configuration | Matched set (6 injectors) |
| Fuel System | Common Rail (CR) |
| Engine | 2003–2004 Dodge Ram 5.9L Cummins 24V (early 305 HP) |
| Core Charge | Yes (refundable upon return; see cart for current amount) |
| Warranty | 1 year / unlimited miles (manufacturer) |
| UPC | N/A (manufacturer does not publish a UPC for this race injector set) |
Install Tips
- Always install new connector/feed tubes to prevent sealing and contamination issues.
- High-flow injectors require adequate lift pump supply, healthy CP3 volume, and proper tuning.
- For drag/sled/tow-rig hybrids, pair with appropriate turbo(s) to control EGTs.
FAQ
Is this injector set streetable?R4 (130% over) is primarily intended for race or competition use. With proper turbo, CP3, lift pump, and tuning, some enthusiasts do run them on the street, but drivability and emissions compliance are your responsibility.
Do I need to replace connector/feed tubes?Yes—new tubes are strongly recommended with any injector install to avoid leaks and contamination. See our Connector/Feed Tubes.
What CP3 do I need?At minimum a healthy stock CP3 with strong lift-pump supply; for best results, upgrade to a stroker (10mm–14mm) or dual CP3 setup depending on your power goals.
Is tuning required?Yes. These injectors move significantly more fuel and require custom calibration to run correctly and to protect your engine.
What else should I upgrade?Ensure adequate air (single S400 or compounds), strong lift pump/filtration, and supporting fuel system components from our 5.9L CR Injector & Kit categories.
