Product Description
Maximum LLY fueling in a direct-fit package. Industrial Injection’s 0986435504SE-R6 reman injector flows 38 LPM for serious power goals while retaining OE-style fit and connector. Each unit is bench-tested and calibrated, ready to drop into your 2004.5–2005 6.6L Duramax LLY.
Fitment
- 2004.5–2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY
What’s Included
- (1) Remanufactured injector, flow-calibrated to 38 LPM
- New sealing washer(s) and necessary O-rings (as provided by manufacturer)
Why This Injector
- High-flow (38 LPM) for big single or compound turbo builds
- OE-style electrical & body for straightforward installation
- Individually tested for balance and return rates
Recommended Parts (CPP internal links)
- Injector Installation Kit (2004.5–2010 Duramax) — seals, gaskets, hardware for a clean install.
- Fuel Filter Head/Housing (LLY–LML) — fix prime/air leaks before new injectors.
- Shop All Duramax Injectors & Nozzles — match a full set for even cylinder fueling.
Cross-Reference / Alternatives
- Stock Flow — 0986435504SE-IIS
- R1 — 23 LPM
- R2 — 25 LPM
- R3 — 27 LPM
- R4 — 29 LPM
- R5 — 33 LPM
- DragonFly — 22 LPM
Helpful Notes
- A core charge typically applies on reman injectors; return usable cores promptly to avoid additional fees.
- For best results, replace all eight injectors as a matched set and bleed air from the fuel system after install.
- High-flow injectors require proper turbo airflow and tuning to control EGT and smoke.
FAQ
Is this the correct injector for my LLY?Yes—0986435504SE series injectors fit the 2004.5–2005 LLY. The R6 variant is the 38 LPM high-flow option.
Do I need tuning with 38 LPM injectors?Custom tuning is strongly recommended to optimize timing, pulse width, and rail pressure for drivability and emissions control.
What else should I replace during the job?Install new seals/lines with an injector install kit and address any fuel filter head leaks to protect the new injectors.
Can I mix different LPM injectors?We do not recommend mixing flows. Use a matched set for balanced cylinder fueling and smooth operation.
