Product Description
Industrial Injection’s R1 (23 LPM) reman injector is a direct-fit upgrade for 2004.5–2005 6.6L LLY Duramax trucks. Built with genuine Bosch components and balanced to tight tolerances, it’s ideal for clean power and reliable daily performance. (R2 25 LPM option available below.)
Fitment
- 2004.5–2005 Chevrolet Silverado/Sierra 2500HD/3500HD — 6.6L Duramax LLY
What’s Included
- (1) Remanufactured injector, LLY specification
- New seals/washers as supplied by Industrial Injection
Why This Injector
- 23 LPM “Race 1” flow for crisp fueling on stock or mild turbo setups
- Bosch-based reman with tight balance for smooth idle and clean smoke
- Direct drop-in for LLY fuel system and electronics
Cross-Reference / Alternatives
- Stock Flow Option — 0986435504SE-IIS
- R2 — 25 LPM (slightly higher flow)
- R3 — 27 LPM (performance)
Recommended Parts (CPP Internal Links)
- Injector Return Line Kit — 2004.5–2010 LLY/LBZ/LMM
- CP3 Injection Pump (LLY Stock Reman)
- Shop All Duramax Injectors & Nozzles
Helpful Notes
- Sold individually; order quantity as needed (8 for a full set).
- We recommend new return lines and clean fuel supply to prevent contamination-related failures.
FAQ
Do I need tuning for the R1 23 LPM injector?R1 23 LPM works well on stock trucks and mild builds; tuning can optimize fueling but isn’t strictly required for basic use.
How does R1 (23 LPM) compare to R2 (25 LPM)?R2 provides a small additional flow bump for slightly more headroom. For tow/daily, R1 is commonly chosen; for mild performance, consider R2.
Is there a core charge?Industrial Injection reman injectors typically carry a refundable core charge; see product options at checkout for details.
What else should I replace during the job?Replace the injector return lines and verify CP3 health. A clean fuel system is critical for injector longevity.
