Product Description
Unlock reliable power gains on your 2003–2004 5.9L Cummins with the Exergy E01 20106 Reman 45% Over Injector Set. Precision-calibrated and flow-balanced by Exergy Performance, these common-rail injectors deliver increased fueling headroom while maintaining smooth idle and excellent street manners when paired with proper supporting mods.
Key Benefits
- ≈45% increase in flow over stock for strong street/tow performance
- Exergy-calibrated, flow-balanced set for cylinder-to-cylinder consistency
- Remanufactured on OE cores with premium internals and test validation
- Supports tuning, turbo, and pump upgrades while retaining drivability
Fitment
- Make/Model: Ram 2500/3500
- Engine: 5.9L Cummins 24V (Common Rail)
- Years: 2003, 2004 (CR)
- Direct replacement for OEM-style common-rail injectors
What’s Included
- Complete set of (6) Exergy E01 20106 Reman 45% Over Injectors
- Test data & flow balance documentation from Exergy
- Installation notes
Recommended Supporting Parts
For best results and injector life, pair with proper supply pressure and clean fuel. We recommend:
- Lift Pump (AirDog / FASS) – stabilizes supply pressure and filtration.
- Exergy Performance (Brand Catalog) – match with Exergy CP3 and fuel system components.
- Injector Seals, Lines & Install Hardware – refresh wear items during installation.
Note: If your vehicle has high miles, inspect/replace connector tubes and return line components as needed.
Tuning & Setup Guidance
- Custom tuning recommended to optimize rail pressure and timing for 45% over flow.
- Ideal with upgraded turbo & CP3; monitor EGTs, rail pressure, and boost.
- Maintain strict fuel filtration standards to protect injector internals.
Frequently Asked Questions
Q: Are these truly a matched set?
A: Yes. Exergy flow-balances each set to ensure even cylinder fueling and smooth operation.
Q: Will I need tuning?
A: Strongly recommended. While the truck may run on stock calibration, proper tuning is key to realize power safely.
Q: Do I need a lift pump?
A: Yes, we highly recommend it. A quality lift pump improves supply pressure and filtration, which protects injectors.
Q: Is there a core charge?
A: Many reman sets carry a refundable core charge. If applicable, details will display in product options or at checkout.
Q: Warranty coverage?
A: Covered under Exergy’s manufacturer warranty. Keep proof of purchase, use clean fuel, and follow installation procedures.
About Exergy Performance
Exergy is a leader in precision common-rail fuel system components. Explore more Exergy parts for your build here: Exergy Performance at CPP Diesel.
