Product Description
S&S Diesel LLY-150SAC-SET 150% Over Injector Set (New) — 2004.5–2005 GM Duramax 6.6L LLY
Unlock serious fueling for your LLY. The S&S Diesel Motorsport LLY-150SAC-SET is a brand-new set of eight high-flow injectors with 150% over SAC nozzles, built with S&S’s proprietary nozzle-honing and tight balancing for clean, consistent delivery and repeatable performance.
Fitment
- 2004.5–2005 Chevrolet Silverado/Sierra HD with 6.6L Duramax LLY (VIN 2)
- Direct replacement set; intended for high-performance builds that require substantial additional fuel.
What’s Included
- (8) Brand-new S&S LLY injectors with 150% over SAC nozzles
- Matched & balanced set to tight tolerances
- Installation notes and injector data as provided by manufacturer
Recommended Supporting Parts
- Duramax Injectors & Nozzles Category — compare injector options and sizes.
- Duramax Fuel Systems & Components — lift pumps, filters, lines to support higher fuel demand.
- FASS Fuel Systems for Duramax — reliable supply pressure and filtration.
- Shop All S&S Diesel at CPP — injectors, pumps, and fuel system hardware.
Helpful Notes
- These 150% injectors are for built applications. Appropriate air (turbo), fuel supply, and custom tuning are required.
- Core policies and emissions compliance vary by configuration and jurisdiction. Verify local laws before use.
FAQ
Do I need custom tuning with 150% over injectors?
Yes. Calibrations are necessary to control idle quality, smoke, and rail pressure with this much additional fuel.
Are these brand-new or remanufactured?
This listing is for a brand-new set. S&S also offers reman options if desired (see brand page).
What other upgrades should I run with these?
At minimum, a quality lift pump/filtration system, adequate turbo airflow, and supporting fuel system plumbing. See our recommended parts above.
Will these fit any LB7/LBZ trucks?
No. These are specifically sized and calibrated for the 2004.5–2005 Duramax LLY.
