Product Description
S&S Diesel LMM-350SAC-SET 350% Over Injector (New) — 2007.5–2010 GM Duramax 6.6L LMM
Built for serious power, this brand-new S&S Diesel Motorsport injector set features 350% over SAC nozzles, precision flow matching, and OE-style calibration discipline for competition applications. S&S’s LMM program offers multiple nozzle sizes with sets balanced to tight tolerances and matched profiles for consistent delivery. Set of 8, brand-new bodies.
- Brand-new S&S LMM injectors with 350% over SAC nozzles (set of 8).
- Flow-matched and set-balanced using OE-style methods for repeatability.
- Competition-level fueling; supporting fuel system/tuning required.
Fitment
2007.5–2010 GM Duramax 6.6L LMM (Chevy Silverado/GMC Sierra 2500/3500). Part number: LMM-350SAC-SET.
What’s Included
- (8) S&S Diesel Motorsport LMM-350SAC-SET injectors — brand new
- Matched SAC nozzles and calibration per S&S standards
- Factory-style electrical connectors and sealing washers (as supplied by S&S)
Recommended Supporting Parts
- Duramax Injectors & Nozzles (Category) — compare injector sizes and brands for LMM builds.
- GM Duramax Lift Pumps (Category) — maintain supply pressure with an in-tank or frame-mounted lift pump.
- GM Duramax CP3 Pumps & Components — pair with a stroker CP3 for high-demand fueling.
- Shop All S&S Diesel at CPP — fuel system components, injectors, pumps, and hardware.
Installation & Notes
- Intended for competition/off-road builds. Professional installation and calibration recommended.
- Match injector size to turbo, pump, and intended power level for best results. (See categories above.)
FAQ
Are these injectors brand new or reman?This listing is for the brand-new set (LMM-350SAC-SET). Reman variants exist under different part numbers with different pricing.
Do I need a lift pump and CP3 upgrade with 350% injectors?Yes. A quality lift pump and an appropriately sized CP3 are strongly recommended to support fuel demand and rail stability at this size. See our internal categories above.
Is tuning required?Yes. 350% over injectors are competition-level and require proper calibration for drivability and reliability.
Will these fit my 2008 Silverado 2500HD LMM?Yes—fits 2007.5–2010 LMM 6.6L applications across Silverado/Sierra 2500/3500.
