Product Description
Wake up your 6.7L Cummins with Industrial Injection’s 0433172145-R4 extrude-honed injector nozzle. Engineered for balanced flow and crisp atomization, the R4 nozzle supports ~250 HP over stock when paired with the proper fuel and air supply. For even more power, the R5 (350 HP) variant is available. Competition/off-road use only where applicable.
Fitment
- 2007.5–2012 RAM 2500/3500 6.7L Cummins (24V, common-rail)
What’s Included
- (1) Extrude-Honed Injector Nozzle (R4, 250HP) — nozzle only
- Installation requires removal of injector and professional setup/calibration
Key Features
- Extrude-honed orifices for balanced flow and improved atomization
- Precision-matched to OE-spec bodies for reliability
- Proven power gains: R4 ≈ 250 HP over stock; R5 ≈ 350 HP over stock
Power Level & Fuel System Notes
- R4 (250HP) — Strongly recommended: dual CP3 fuel supply and appropriate turbo/airflow.
- R5 (350HP) — Requires dual CP3s and significant airflow upgrades.
Recommended CPP Parts (Internal Links)
- Industrial Injection Dual CP3 Kit w/ Pump (07.5–18 6.7L)
- Industrial Injection Dual CP3 Kit — Kit Only (07.5–18)
- Shop 6.7L Cummins Injectors & Install Accessories
- Injector Seal/Connector Kits & Tools (6.7L)
- High-flow Fuel Rail / PRV Solutions
Cross-Reference / Alternatives
Helpful Notes
- Tuning required. Calibrate fueling and timing for safe EGTs and rail pressure.
- Calibration/flow-matching recommended. Have nozzles calibrated to your injectors for best results.
- Fuel supply. R4/R5 setups typically need a dual-CP3 system to maintain commanded rail pressure under load.
- Emissions. Intended for competition/off-road where permitted. Verify local laws.
FAQ
Is this sold as a set or individually?Nozzles are commonly sold individually. Order the quantity needed for your cylinder count and have a qualified shop install and calibrate.
Do I need dual CP3s with the R4/R5?Yes—at these flow rates a dual CP3 system is strongly recommended (R4) and effectively required (R5) to hold rail pressure at WOT.
Will my stock turbo be enough?R4 can outrun a stock turbo; plan for a larger turbo/air system and careful tuning. R5 requires significant airflow upgrades.
Do I need custom tuning?Yes. Increased nozzle flow changes fueling. Proper ECU calibration is critical for power, smoke control, and reliability.
