Product Description
S&S Diesel LLY-350SAC-R-SET 350% Over (Reman) Injector Set — 2004.5–2005 GM Duramax 6.6L LLY
Build serious fuel with S&S Diesel Motorsport’s 350% over reman injector set for LLY. Each set is flow-matched, SAC-nozzle equipped, and engineered for consistent rate shape and high-output performance.
Fitment
- 2004.5–2005 Chevy Silverado/GMC Sierra 2500HD & 3500 — 6.6L Duramax LLY
- Direct-fit LLY fuel system architecture (competition/race use; appropriate tuning and supporting mods required)
What’s Included
- (8) S&S Diesel Motorsport LLY Reman Injectors — 350% over flow (SAC nozzle)
- Matched/balanced set for consistent fueling
- Core return program (core charge may apply)
Recommended Supporting Parts
- Shop All S&S Diesel at CPP
- S&S LLY-350SAC-SET — 350% Over (NEW) Injectors — brand-new alternative to this reman set
- Fuel System Upgrades — lift pumps, filtration, and lines to safeguard high-flow injectors
Helpful Notes
- Professional installation and custom calibration are strongly recommended at this power level.
- High-flow injectors can exceed the capacity of stock air and fuel supply components — plan supporting mods accordingly.
- Verify local laws; many high-flow components are for off-road/competition use.
FAQ
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How big is “350% over” compared to stock?
“350%” refers to the nozzle flow increase over stock. This size supports extreme fueling needs and requires tuning plus substantial supporting mods.
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Are these injectors balanced/matched as a set?
Yes. Sets are flow-matched to tight tolerances to promote smooth operation and consistent cylinder-to-cylinder fueling.
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Do I need a lift pump and upgraded filtration?
At this flow level, a quality lift pump and robust filtration are highly recommended to maintain pressure and protect the injectors.
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Is tuning required?
Yes. Proper ECU calibration is required to take advantage of the additional fuel and to maintain drivability.
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Will these pass emissions testing?
These injectors are intended for race/competition builds. Check local and state regulations before purchase/installation.
