Product Description
S&S Diesel LLY-500SAC-SET 500% Over Injector Set (NEW) — 2004.5–2005 GM Duramax 6.6L LLY
Built for serious fuel demand, this brand-new S&S Diesel Motorsport injector set uses EDM/honed SAC nozzles sized at 500% over and is flow-matched for consistency across all eight injectors. Ideal for competition and high-output builds where properly engineered fueling is mandatory. General LLY Duramax injector details, sizing options, and quality standards are outlined by S&S on their Duramax injector pages.
Fitment
- Make/Model: Chevrolet Silverado 2500HD/3500HD; GMC Sierra 2500HD/3500HD
- Engine: 6.6L Duramax LLY
- Years: 2004.5–2005
What’s Included
- (8) Brand-new S&S Diesel Motorsport injectors — 500% over SAC-nozzle configuration
- Matched, balanced set built to S&S standards (set-level flow matching)
- Documentation as supplied by manufacturer
Recommended Supporting Parts
- Shop S&S Diesel at CPP — pair with S&S CP3s, pumps, and fuel system components.
- Duramax Injectors & Nozzles Category — compare injector sets and components for GM platforms.
- GM Duramax Fuel Lift Pumps — stabilize supply pressure for large injector/turbo setups.
- Fuel System Components (Duramax) — filtration, lines, and accessories to protect your injectors.
- Sumps & Suction Tubes (Duramax) — improve feed and reduce aeration in high-demand builds.
Helpful Notes
- Intended for high-horsepower/competition builds; appropriate tuning, turbo, and fuel system upgrades are required.
- Professional installation recommended; maintain excellent filtration and clean fuel to protect the system.
- Emissions compliance varies by setup and jurisdiction; verify local and federal laws before purchase/use. Distributor pages flag race-only usage on large sizes.
FAQ
- Are these injectors brand-new or reman? — This set is brand-new (NEW), built by S&S Diesel Motorsport.{index=5}
- What does “500% over” mean? — The nozzle flow is ~500% higher than stock, enabling extreme fuel delivery for race/competition builds. S&S explains size conventions on their injector pages.
- Do I need a lift pump and tuning? — Yes. A lift pump and custom calibration are strongly recommended for pressure stability and control with injectors this large. See our Duramax lift pump category. Shop Lift Pumps.
- Will these fit all LLY trucks? — Fitment targets 2004.5–2005 GM LLY-equipped 2500HD/3500HD models. Always confirm your VIN/engine code before ordering.
- What warranty applies? — S&S indicates warranty coverage on their injector offerings; terms vary by product/variant. Check current S&S policy and keep proof of purchase.
