Product Description
S&S Diesel LLY-350SAC-SET 350% Over (NEW) — 2004.5–2005 GM Duramax 6.6L LLY
Maximum fueling for serious LLY builds. This brand-new S&S Diesel Motorsport injector set uses SAC nozzles that are flow-matched and built on OE-grade equipment, delivering approximately 350% over stock fuel flow for competition applications when paired with proper air, pump, and tuning.
Fitment
- 2004.5–2005 Chevrolet Silverado 2500HD/3500HD — 6.6L Duramax LLY
- 2004.5–2005 GMC Sierra 2500HD/3500HD — 6.6L Duramax LLY
What’s Included
- (8) Brand-new S&S Diesel LLY SAC injectors — 350% over
- Flow verification and matched set documentation (per S&S process)
- Install-ready with new sealing/wear components as supplied by S&S
Recommended Supporting Parts
- CP3 Pumps & Components — Duramax (10mm/12mm/14mm stroker pumps recommended for high-fuel builds)
- Fuel Systems & Components — Duramax (lift pump, filters, lines, regulators)
- Fuel Injection Lines — Duramax (high-pressure lines and related hardware)
- Shop All GM Duramax (air system, turbo, intercooler, head studs, tuning)
Installation & Notes
- Competition use only. Requires adequate turbo airflow, high-output CP3 fueling, and custom tuning.
- Core policies may apply to injector programs; see cart & order terms for any refundable core charges.
FAQ
- Are these injectors brand-new or reman?
This listing is for a brand-new SAC-nozzle set (not reman). Reman options exist for other part numbers. - Do I need a stroker CP3?
Yes, at this size most builds pair a high-output CP3 (10mm/12mm/14mm) to maintain rail pressure under load. - Will stock turbo and fuel system work?
No. A 350% set requires upgraded turbo(s), lift pump/filtration, lines, and custom calibration to run correctly. - What trucks does this fit?
2004.5–2005 GM 2500HD/3500HD with the LLY 6.6L Duramax. - Is there a warranty?
S&S Diesel Motorsport injectors are built and calibrated on Bosch equipment; warranty terms vary by item—see manufacturer policy with your order paperwork.
