Product Description
S&S Diesel LLY-80SAC-SET — 80% Over Injector Set (New) — 2004.5–2005 Duramax 6.6L LLY
Serious LLY fueling with S&S quality. This brand-new (not reman) 80% over SAC-nozzle injector set is engineered and flow-matched to tight tolerances for consistent delivery and clean burn. Ideal for high-output street/strip and competition LLY builds when paired with proper air, lift-pump supply, and tuning.
Fitment
- 2004.5–2005 Chevrolet Silverado/GMC Sierra 2500HD/3500HD — 6.6L Duramax LLY
- Direct LLY application; tuning, adequate lift-pump supply, and supporting airflow highly recommended.
What’s Included
- (8) Brand-new S&S Diesel Motorsport 80% over SAC-nozzle injectors (LLY-80SAC-SET)
- Flow-matched set for balanced cylinder fueling
- Install documentation and injector data sheet (as provided by manufacturer)
Recommended Supporting Parts
- Shop S&S Diesel at CPP — pair with S&S pumps and components for a matched system.
- Duramax Injectors & Nozzles — complementary injector hardware and nozzles.
- Duramax Fuel Systems & Components — lift pumps, filters, lines, and fittings to protect your injectors.
- All GM Duramax Categories — intake, turbo, intercooler, and exhaust upgrades to support added fueling.
Installation Notes
- Professional installation and calibration strongly recommended.
- Verify injector return rates, prime the system correctly, and follow torque/cleanliness best practices.
- For off-road/competition builds, confirm local regulations before use.
FAQ
What horsepower range can 80% over LLY injectors support?With appropriate turbo(s), high-flow CP3, quality lift pump/filtration, and tuning, 80% over injectors can support significant power increases versus stock. Exact output depends on your air system and calibration.
Are these brand-new or remanufactured?This listing is for a brand-new set (LLY-80SAC-SET). If you need reman, reach out and we can source LLY-80SAC-R-SET.
Do I need a lift pump and tuning?Yes. A quality lift pump and custom tuning are highly recommended to maintain rail supply and optimize fueling/driveability with 80% over injectors.
Will these fit my 2004 (early) LB7?No. These are specific to mid-2004.5–2005 LLY applications. Check your VIN/engine code if unsure.
