Product Description
S&S Diesel LMM-400SAC-R-SET 400% Over Injector Set (Reman) — 2007.5–2010 GM Duramax 6.6L LMM
Built by S&S Diesel Motorsport for high fuel delivery and precise control, this remanufactured 400% over LMM injector set is engineered for serious power goals. S&S flow-matches and balances sets to tight tolerances and uses OE-grade processes and equipment for consistency across the full operating range.
Key Features
- Remanufactured LMM injector set sized to ~400% over stock nozzle flow for extreme fueling demands.
- Sets built using S&S proprietary nozzle-honing and multi-point flow verification for consistency.
Fitment
2007.5–2010 Chevrolet Silverado/GMC Sierra HD with 6.6L Duramax LMM. (Verify overall build and supporting mods; intended for competition/large-fuel systems.)
What’s Included
- (8) S&S Diesel LMM Reman Injectors — 400% Over (matched set)
- Build spec and flow test documentation (per S&S injector process).
Recommended Supporting Parts
- Duramax Injectors & Nozzles (Category) — browse LMM-specific options and related components.
- GM Duramax Parts Hub — centralized shopping for LMM fuel, air, and hard parts.
- Fuel Injection Line (Category) — replace fatigued high-pressure lines during injector service.
- Injector Return Line Kit (LLY/LBZ/LMM) — refresh return hardware on install.
- LMM Injector Options @ CPP — compare alternative flow sizes for your power target.
Helpful Notes
- Tuning and major supporting mods are required for 400% over fuel capacity (turbo, CP3/dual fuelers, fuel supply, etc.). Example product pages for high-percent LMM sets call out the need for upgraded pumps/turbo and custom calibration.
- Core policy applies on many reman sets; check your cart for core handling.
FAQ
Are these injectors truly 400% over stock?Yes—this set is designated as 400% over for LMM applications, intended for extreme fueling. Always verify your build can support this volume.
Do I need upgraded fuel supply and turbo?Absolutely. 400% over injectors require substantial supporting mods (lift pump, high-flow CP3/dual fuelers, turbo, and custom tuning).
What quality controls does S&S use?S&S employs proprietary nozzle honing with tight flow matching and multi-point verification to align injection profiles across the set.
Will these fit my 2008 LMM?Yes—fitment covers 2007.5–2010 LMM trucks (Chevy/GMC HD). Always confirm by VIN and build list.
