Product Description
Overview
The Industrial Injection 0986435503SE-R1 is a Race 1 (25% over) remanufactured common-rail injector for the early 2003-2004 Dodge Ram 2500/3500 5.9L Cummins. Flow-benched and balanced, this R1 build targets ~100 HP over stock with approximately 30 LPM flow while maintaining crisp idle and drivability when paired with proper air and fuel support.
- Approx. 25% over / ~100 HP gain potential (supporting mods required)
- Flow: ~30 LPM (Race 1 calibration)
- Application: 2003-2004 5.9L Cummins (early common rail)
- Warranty: 1-Year (manufacturer; see details)
Fitment
Direct fit for 2003-2004 Dodge Ram 2500/3500 5.9L Cummins 24V (early common-rail CP3).
What's Included
- (1) Remanufactured injector, Race 1 (25% over)
- New seals installed (as applicable)
Recommended Supporting Parts
- CP3 Injection Pump Upgrades ('03-'07 5.9L) - ensure adequate supply for higher-flow injectors.
- Bosch/Cummins Injector Feed/Connector Tubes - replace any worn tubes to prevent return leaks.
- Valve Cover Gasket (OE) or MAHLE VS50416 - recommended during injector service.
- 03-07 5.9L Injector & Install Parts - tools, lines, and related components.
- 03-04 Injector Category - explore additional sizes/sets.
Specifications
| Brand | Industrial Injection |
|---|---|
| Part Number | 0986435503SE-R1 |
| Build | Remanufactured, Race 1 (R1) |
| Flow Increase | ~25% over stock (~100 HP potential with supporting mods) |
| Flow Rate | ~30 LPM (calibrated set spec) |
| Engine | 5.9L Cummins 24V (Common Rail, Early 2003-2004) |
| Quantity | Sold individually (order 6 for a full set) |
| Warranty | 1 Year (manufacturer) |
| Core Charge | May apply (per injector); refundable upon acceptable core return |
| UPC | Not published by manufacturer |
Notes
- Higher-flow injectors require adequate air (turbo) and fuel supply (lift pump/CP3). Monitor EGTs and rail pressure.
- Professional installation recommended; follow Cummins/Bosch procedures for connector tube seating and torque.
FAQ
Is tuning required to run R1 (25% over) injectors?Tuning is strongly recommended to optimize idle quality, drivability, and EGTs with higher-flow injectors.
Can I use the stock CP3 with these injectors?Some customers run R1 on a healthy stock CP3, but a quality CP3 (or upgraded unit) is advised to maintain commanded rail pressure under load. See our CP3 options.
Do I need new injector connector (feed) tubes?Replacing worn tubes and seals helps prevent return leaks and hard-start issues. Consider new OE tubes such as Cummins 4988806.
Is this sold as an individual injector or a set?This listing is sold individually. Order quantity 6 for a complete engine set.
What is the warranty and core policy?Manufacturer warranty is typically 1 year. A refundable core charge may apply per injector; cores must be returned within the stated timeframe and in rebuildable condition.
