Product Description
Dial in precise fueling on your LMM with the INDUSTRIAL INJECTION 0433171985-R2 extrude-honed injector nozzle (22 LPM). A great step up from stock for tuned street/weekday work trucks that want clean atomization and reliable power without jumping to huge flow numbers. Sold individually (per nozzle); order quantity 8 for a complete set.
Fitment
- 2007.5–2010 GM 6.6L Duramax LMM (Silverado/Sierra 2500HD/3500HD)
What’s Included
- (1) Extrude-honed injector nozzle — 22 LPM (R2)
- Flow-matched to the R2 spec for LMM applications
Why This Nozzle
- Clean, consistent spray pattern with calibrated 22 LPM flow for mild performance builds
- OE-supplier cores honed to spec and quality-checked for durability
- Scalable path: start with R2 now, move to higher LPM options later without changing injectors
Recommended Parts (CPP Internal Links)
- Exergy 2000-bar Rail Pressure Relief Valve (LLY/LBZ/LMM)
- Exergy 2400-bar Race-Only Rail Pressure Relief Valve (LLY/LBZ/LMM)
- Exergy Stock Replacement Fuel Rail – Left (2007.5–2010 LMM)
- S&S Diesel 45% Over NEW Injector Set (2007.5–2010 LMM) — alternative if you prefer complete injectors
- Shop All GM Duramax Categories
Cross-Reference / Alternatives (Same Platform)
- 0433171985-R1 — 20 LPM (mildest)
- 0433171985-R3 — 24 LPM
- 0433171985-R5 — 30 LPM (hot street / light race)
Helpful Notes
- Professional installation required. Nozzle swaps require proper tools, ultra-clean work, and calibration checks.
- Sold individually. Buy 8 nozzles for a complete engine set.
- Emissions: Performance nozzles are intended for closed-course competition use where permitted.
FAQ
How much power can 22 LPM support?R2 (22 LPM) pairs well with a tuned LMM and basic airflow upgrades. It’s a step up from stock without the smoke/EGT penalty of very large nozzles.
Is tuning required?Custom calibration is strongly recommended any time you change nozzle flow to optimize fueling, drivability, and EGT control.
Should I upgrade the rail relief valve?For tuned applications, a higher-clamp PRV helps maintain rail pressure under load. See the Exergy PRV options in the Recommended Parts above.
Do I need full injectors instead?Nozzle-only is cost-effective if your injectors are healthy. If you need replacements or much higher flow, consider a matched injector set (see S&S link above).
