INDUSTRIAL INJECTION 0433171860-R3 GM EXTRUDE HONED INJECTION NOZZLE — 2004.5–2005 6.6L LLY DURAMAX — 29 LPM (RACE 3)

Dial in precise fueling on your LLY. The INDUSTRIAL INJECTION 0433171860-R3 extrude-honed injector nozzle flows 29 LPM (Race 3 – ~40% over) for clean, consistent delivery on 2004.5–2005 GM 6.6L Duramax LLY engines. Each nozzle is OE-sourced and engineered with Industrial Injection’s flow-match process for smooth idle quality and reliable performance. Sold individually.

Fitment

• 2004.5–2005 Chevrolet Silverado/GMC Sierra 2500HD & 3500HD
• Engine: 6.6L Duramax LLY (mid-2004.5 through 2005)

What’s Included

• (1) New OE-spec extrude-honed nozzle — 29 LPM
• New copper crush washer

Why It Works

• Flow-matched calibration for smooth operation cylinder-to-cylinder
• Better atomization and repeatability under load
• No core required; competition-use component

Recommended Parts (CPP internal links)

• Injector Return Line Kit (LLY/LBZ/LMM)
• Exergy 10mm Stroker CP3 (LLY) or 14mm Race CP3 for higher demand builds
• ARP 230-4201 Head Studs for elevated cylinder pressure combinations
• S&S LLY 60% Over NEW Injector Set
• Browse All Duramax Injectors & Nozzles

Cross-Reference / Alternatives (LLY Nozzles)

• R1 — 25 LPM
• R2 — 27 LPM
• R4 — 32 LPM
• R5 — 37 LPM
• R6 — 42 LPM
• DragonFly — 24 LPM (+15%)

Helpful Notes

• Sold individually. Order 8 for a full set.
• Professional cleaning, pop-testing, and balance recommended when installing nozzles on used injectors.
• Competition-use product. Confirm emission compliance for your application.

FAQ

Output varies with air, cp3, tuning, and overall health. Race 3 (~40% over) commonly supports strong street/strip builds with proper turbo and CP3 supply.

Yes. Proper calibration is recommended to optimize pulse width, timing, and rail pressure for best drivability and EGT control.

A new copper nozzle washer is included. We suggest replacing the injector return lines/seals during service (see Recommended Parts).

No. These are competition components and are not legal for use on pollution-controlled vehicles on public highways.