Product Description
S&S Diesel LLY-100SAC-SET 100% Over Injector Set (NEW) — 2004.5–2005 GM Duramax 6.6L LLY
Serious fueling for your LLY. This brand-new (not reman) S&S Diesel Motorsport injector set uses honed SAC nozzles sized at 100% over stock and is flow-matched and balanced as a set for smooth operation and consistent power delivery.
- Brand-new Bosch-based injectors, modified by S&S (not reman).
- SAC nozzle design, 100% over stock flow.
- Flow-matched & balanced across multiple test points for tight variance.
- Built to OE-level standards for durability and repeatability.
Fitment
Chevrolet Silverado / GMC Sierra 2500HD & 3500HD with 6.6L Duramax LLY, model years 2004.5–2005.
What’s Included
- (8) S&S Diesel Motorsport LLY injectors — 100% over (NEW)
- Install notes & test data (per S&S standards)
Recommended Supporting Parts
- Duramax Injectors & Nozzles — browse related LLY injector hardware and nozzle options.
- GM Duramax Fuel Lift Pumps — ensure stable supply and filtration for high-flow injectors.
- 12mm Stroker CP3 for LLY — pair with a high-output CP3 when targeting higher horsepower.
- Shop All S&S Diesel at CPP — more S&S fuel system upgrades.
Installation & Notes
- Professional installation and proper calibration/tuning are recommended for 100% over injectors.
- Intended for high-performance/competition builds. Verify local emissions regulations before purchase/use.
FAQ
Are these injectors brand-new or remanufactured?They are supplied as brand-new injectors modified by S&S with 100% over SAC nozzles.
Do I need a lift pump or CP3 upgrade?For best results and to maintain rail pressure at higher load, we recommend a quality lift pump and, for aggressive power goals, a higher-output CP3.
How are the injectors matched?S&S flow-matches and balances each set across multiple pressure/energizing points for tight variance and smooth drivability.
Will these fit all 2004 LLY trucks?Fitment applies to 2004.5–2005 LLY models (mid-year change). Confirm your engine code (LLY) and build date.
