Product Description
S&S Diesel LLY-450SAC-R-SET 450% Over Injector Set (Reman) — 2004.5–2005 GM Duramax 6.6L LLY
Built for extreme fueling and competition use, the S&S Diesel Motorsport LLY-450SAC-R-SET is a remanufactured, flow-matched set of eight Duramax LLY injectors with 450% over nozzle flow (SAC). S&S applies its proprietary nozzle honing and OE-style test procedures to deliver consistent injection profiles under demanding conditions.
- Set of 8 reman LLY injectors with SAC nozzles, sized to 450% over stock flow.
- Flow-matched using OE-style standards and multi-point testing for balanced delivery.
- Designed for high-horsepower, competition-oriented builds; professional calibration required.
Fitment
2004.5–2005 Chevrolet/GMC 2500HD/3500HD equipped with the 6.6L Duramax LLY. Verify your build’s supporting fuel, air, and tuning hardware before installation.
What’s Included
- (8) Remanufactured S&S LLY injectors with 450% over SAC nozzles
- Balanced/matched set and documentation
- Core program (return required on reman units)
Recommended Supporting Parts
- Duramax Injectors & Nozzles (Category) — browse related injector/nozzle upgrades.
- Fuel Systems & Components (Duramax) — lines, regulators, fittings, and filters to support higher flow.
- AirDog Lift Pumps (Duramax) — reliable low-pressure supply for big-injector builds.
- CP3 Pumps & Components (Duramax) — from stock to stroker CP3s for sufficient rail pressure.
- Exergy 14mm Stroker CP3 (LLY) — race-series pump for extreme fueling demands.
Helpful Notes
- Competition part; ensure adequate turbo airflow, fuel supply (lift pump), and CP3 capacity.
- Core return required on reman sets; check your invoice for details.
- Not legal for use on emissions-controlled vehicles on public roads where prohibited.
FAQ
- Are these true 450% over SAC nozzles?
Yes—this set uses SAC-style nozzles at ~450% over stock flow for extreme fueling. - Will my stock CP3 support 450% over injectors?
No. You’ll need at minimum a high-output or stroker CP3 (and a quality lift pump) to maintain rail pressure. See our CP3 category and Exergy options. - Do I need custom tuning?
Yes. Calibration is required to manage pulse width, timing, and rail pressure with injectors of this size. - Is there a core charge?
Yes—reman sets require cores to be returned; policies vary by supplier.