Product Description
S&S Diesel LLY-45SAC-SET 45% Over Injector Set (NEW) — 2004.5–2005 GM Duramax 6.6L LLY
Build your LLY the right way. This brand-new S&S Diesel Motorsport 45% over injector set uses SAC-type nozzles, proprietary honing, and tight flow matching for clean, consistent fueling and reliable power gains.
- SAC-type nozzles with proprietary honing for precise, repeatable flow
- Nozzles flow-matched to ~1% per set; injectors balanced to tight tolerances
- Brand-new bodies (NEW set), engineered for performance and durability
- Excellent choice for tuned street/strip builds with supporting mods
Fitment
2004.5–2005 Chevrolet Silverado/GMC Sierra 2500HD & 3500HD with 6.6L Duramax LLY.
What’s Included
- (8) S&S Diesel LLY 45% Over Injectors — NEW
- Install notes and spec sheet (as applicable)
Recommended Parts
- Duramax Injectors & Nozzles (Category) — compare LLY injector options and sizes.
- GM Duramax Parts (All Generations) — find complementary upgrades for a balanced build.
- 12mm Stroker CP3 (LLY) — supports higher fuel demand with proper tuning.
- Shop All S&S Diesel at CPP — injectors, pumps, conversion kits & more.
Notes
- Professional installation and appropriate tuning are recommended for 45% over injectors.
- Verify emissions compliance for your use-case and location.
FAQ
Are these injectors truly brand-new or remanufactured?This listing is for a NEW set (LLY-45SAC-SET). S&S also offers reman options, but this SKU denotes brand-new bodies.
What tuning is required for 45% over injectors?Custom calibration is strongly recommended to manage fueling, smoke, and driveability while taking advantage of the added flow.
Will these fit all 2004 models?They fit 2004.5–2005 LLY (mid-year change). They do not fit early LB7 trucks.
What supporting mods do you recommend?At minimum: a healthy CP3 (stroker recommended for higher power), clean filtration, adequate lift-pump supply, and quality tuning.
