INDUSTRIAL INJECTION 0433171860-R5 LLY DURAMAX EXTRUDE-HONED INJECTION NOZZLE — 2004.5–2005 6.6L — 37 LPM

Step up fueling on your mid-2004.5–2005 LLY with Industrial Injection’s extrude-honed Bosch nozzle sized at 37 LPM (R5). Ideal for performance builds where clean atomization, repeatable flow, and tuner control matter. Sold individually.

Fitment

• 2004.5–2005 Chevrolet/GMC 2500HD & 3500HD
• Engine: 6.6L Duramax LLY (mid-2004.5 changeover; not for LB7)

Specs & Notes

• Flow rate: 37 LPM (R5)
• Core nozzle: Bosch 0433171860
• Tuning required for proper pulse-width, rail pressure, and smoke/EGT control
• Recommended for trucks with upgraded air & fuel supply
• Sold individually; order 8 for a complete set

Recommended Parts (CPP internal links)

• MAHLE GS33505A Injector Seal Kit (04.5–07 LLY/LBZ/LMM)
• DTech DT660023 Injector Return Line Kit (04.5–10 LLY/LBZ/LMM) or Bostech ISK637
• Exergy 10mm Stroker CP3 (LLY) or Stock-flow CP3 (new)
• Exergy 2000-bar PRV (LLY/LBZ/LMM)
• Shop All Duramax Injectors & Nozzles

Cross-Reference / Alternatives (Flow Options)

• 0433171860DFLY — 24 LPM (Dragonfly)
• R1 — 25 LPM • R2 — 27 LPM • R3 — 29 LPM • R4 — 32 LPM • R6 — 42 LPM

Helpful Notes

• Mid-year split: LLY begins in 2004.5; early-2004 LB7 uses different nozzles.
• Always verify flow rate, cylinder balance, and tune before heavy load or towing.
• For big power builds, consider matched SAC-nozzle injector sets (e.g., S&S) with appropriate turbo/CP3 upgrades.

FAQ

Yes. Proper calibration of pulse width, timing, and rail pressure is required to keep smoke and EGT in check.

Nozzles are sold individually. Order eight (8) to outfit a complete set of injectors.

Fresh injector seals/return lines, adequate lift pump/filtration, a healthy or upgraded CP3, and (as power rises) an upgraded PRV. Bigger turbo(s) are recommended at higher fueling levels.

No. This R5 nozzle is specific to the mid-2004.5–2005 LLY platform.