Product Description
S&S Diesel LB7-400SAC-SET 400% Over Injector (New) — 2001–2004 GM Duramax 6.6L LB7
Maximum fueling for serious LB7 builds. This brand-new S&S Diesel Motorsport injector set uses EDM/honed SAC-type nozzles sized to ~400% over to support extreme horsepower levels when paired with appropriate air and fuel supply. Built on new components and balanced as a matched set for precision delivery. Retailer listings confirm the 400% set availability for 2001–2004 LB7.
Key Features
- New (not reman) injector set with EDM/honed SAC nozzles, flow rated at ~400% over.
- Matched/balanced set for consistent cylinder-to-cylinder delivery (± tolerance per seller specs).
- Designed for competition/race applications; requires extensive supporting mods.
Fitment
2001–2004 Chevrolet Silverado/GMC Sierra 2500/3500 with 6.6L Duramax LB7.
What’s Included
- (8) S&S Diesel LB7 400% Over SAC Injectors — New.
- Set is flow-matched and calibrated on professional equipment (per retailer description).
Recommended Supporting Parts (CPP-Only Links)
- LB7 High-Pressure Injector Lines — replace aged/corroded lines during injector service.
- LB7 Fuel Return Line Kit — fresh seals/hardware to prevent leaks.
- In-Tank Lift Pump (LB7) — ensure consistent low-pressure supply for high-flow systems.
- Fuel Injection Line Category — browse injector line options for GM Duramax.
- High-Output CP3 Pump (LB7/LBZ-based) — pair with big injectors for proper rail supply.
- Shop All S&S Diesel at CPP — more S&S injectors, pumps, and hardware.
Installation & Notes
- Competition/off-road use where permitted. Verify local regulations.
- Core policy and pricing vary by seller; some listings show core handling at checkout.
FAQ
Are these injectors street-legal?400% over injectors are intended for competition builds. Check local and federal laws before purchase/use.
Do I need additional fuel system upgrades?Yes. A high-output CP3 and an upgraded lift pump are strongly recommended to supply sufficient rail pressure/volume for 400% nozzles.
Is this a new or reman set?New injector set with SAC-type nozzles (not reman), per retailer descriptions.
What vehicles does this fit?2001–2004 Chevy/GMC 2500/3500 with the 6.6L Duramax LB7.
