S&S DIESEL LBZ-400SAC-R-SET 400% OVER (REMAN) INJECTOR SET — 2006–2007 GM DURAMAX 6.6L LBZ

S&S Diesel LBZ-400SAC-R-SET 400% Over (Reman) Injector Set — 2006–2007 GM Duramax 6.6L LBZ

Serious LBZ fueling for serious power. This S&S Diesel Motorsport 400% Over (Reman) injector set uses SAC-style nozzles and S&S balancing/matching processes to deliver massive, consistent flow for competition builds. Each set is flow-matched to tight tolerances for clean, predictable performance when paired with proper air, fuel supply, and tuning.

Fitment

• 2006–2007 Chevrolet Silverado/GMC Sierra 2500HD & 3500HD
• Engine: Duramax 6.6L LBZ
• Intended for competition/off-road use; proper tuning and supporting mods required.

What’s Included

• (8) S&S Diesel remanufactured common-rail injectors — 400% over (LBZ-400SAC-R-SET)
• Matched set, calibrated and balanced
• Core return required per S&S policy

Recommended Supporting Parts

• Duramax Injectors & Nozzles — GM
• GM Duramax CP3 Pumps & Components
• GM Duramax Fuel Lift Pumps
• ARP 230-4201 Head Stud Kit (LB7/LLY/LBZ/LMM/LML)
• Shop All S&S Diesel at CPP

Installation Notes

• Lift pump and adequate filtration are recommended to protect injectors and maintain rail supply.
• Professional installation and custom tuning are strongly recommended for 400% over sets.
• Verify local laws for emissions compliance and usage.

FAQ

• Are these true 400% over injectors?
  Yes. The set is built with SAC-style nozzles sized to approximately 400% over stock, intended for high-output competition builds.
• Do I need a CP3 upgrade?
  Almost always, yes. A high-output CP3 and a quality lift pump are recommended to supply sufficient rail pressure and volume.
• Will stock pistons/rods survive 400% over?
  Not advised. Work with your tuner and consider built engine components, head studs, and appropriate turbo(s) to manage cylinder pressure and heat.
• Is tuning required?
  Absolutely. Custom tuning is required to properly command pulse width, timing, and rail pressure for 400% over injectors.
• Street legal?
  Generally, no. These are competition-intended components. Check and follow all local regulations.