Product Description
Step up fueling on your LLY Duramax with the Industrial Injection 0433171860-R4 Extrude Honed Nozzle, flowed to 32 LPM for clean, controllable power when paired with proper air, lift-pump supply, and custom tuning. Each nozzle starts as an OE-spec part and is precision balanced after the extrude-hone process for consistent cylinder-to-cylinder delivery.
Fitment
- 2004.5–2005 Chevrolet Silverado / GMC Sierra 2500HD & 3500HD — 6.6L Duramax LLY
What’s Included
- (1) Extrude-honed injector nozzle — 32 LPM flow
- New copper crush washer
Key Features
- OE-spec plus nozzle, extrude honed and flow balanced
- 32 LPM (approx. +% over stock; tuning required for best results)
- Improved atomization for crisp response and strong top-end
- Individually tested on a state-of-the-art nozzle bench
- Sold individually (order 8 for a complete set)
Recommended Parts (CPP internal links)
- S&S Diesel 30% Over Reman Injector Set — LLY (good match for moderate builds)
- S&S Diesel 80% Over NEW Injector Set — LLY (for higher-output combos)
- S&S Diesel 100% Over NEW Injector Set — LLY
- Shop All GM Duramax Categories
Cross-Reference / Alternatives (LLY Nozzles, CPP only)
- 0433171860-R1 — 25 LPM
- 0433171860-R2 — 27 LPM
- 0433171860-R3 — 29 LPM
- 0433171860-R5 — 37 LPM
- 0433171860-R6 — 42 LPM
- 0433171860DFLY — 24 LPM (Dragonfly)
Helpful Notes
- Tuning is required to realize the benefits of higher-flow nozzles.
- We strongly recommend a quality lift pump and adequate turbo airflow for EGT control.
- Emissions note: competition-use only where applicable. Check local and federal laws.
FAQ
Is this nozzle sold individually or as a set?It is sold individually. Order a quantity of eight (8) for a full set on an LLY.
Do I need custom tuning with 32 LPM nozzles?Yes. Custom tuning is required to match pulse width and duration to the increased flow for clean drivability and optimal power.
What else should I upgrade?A quality lift pump, clean fuel filtration, and sufficient turbo airflow are highly recommended. Consider matched injector sets for higher power goals.
Is there a warranty?Industrial Injection performance parts typically carry a 1-year warranty; see product details for terms.
