Product Description
Wake up your 2004.5–2005 LLY Duramax with the Industrial Injection Dragonfly 24 LPM (+15%) extrude-honed Bosch nozzle. Sized for crisp +50 HP gains with minimal smoke/EGT rise when properly calibrated, this nozzle is a clean, reliable path to more towing power and throttle response.
Fitment
- GM 6.6L Duramax LLY (Model Years 2004.5–2005)
Flow & Gains
- 24 LPM flow (≈ +15% over stock)
- Approx. +50 HP potential with supporting mods/tuning
Sold Individually
Order quantity 8 for a complete engine set.
What’s Included
- (1) New Bosch extrude-honed nozzle (0433171860DFLY)
Recommended Parts (CPP internal links)
- Duramax Injectors & Nozzles Category
- Injector Return Line Kit (LLY/LBZ/LMM)
- Alternate Return Line Kit (DTech)
- GM Duramax CP3 Pumps & Components
- S&S LLY Injector Options (matched sets)
Helpful Install Notes
- Nozzle sizing changes fueling—custom tuning is recommended to optimize power, smoke, and EGT.
- Always verify pilot/main injection quantities and balance rates after install.
- Replace aged return lines and seals while you’re in there.
Cross-Reference / Alternatives (LLY only)
- Industrial Injection 0433171860-R1 — ~25 LPM
- Industrial Injection 0433171860-R2 — ~27 LPM
- Industrial Injection 0433171860-R3 — ~29 LPM
- Industrial Injection 0433171860-R5 — ~37 LPM
FAQ
Will 24 LPM nozzles require tuning?Yes—while many trucks see modest smoke/EGT change, proper calibration is recommended to maximize power and drivability.
Are these true Bosch nozzles?Yes. The Dragonfly series starts with new Bosch nozzles that are extrude-honed and flow-matched for consistency.
How many do I need to buy?They are sold individually. Purchase 8 for a complete set.
What supporting mods help most on an LLY?Healthy CP3 supply, clean fuel filtration, updated return lines/seals, and quality tuning. See our recommendations above.
