S&S DIESEL LMM-300SAC-R-SET 300% OVER INJECTOR (REMAN) — 2007.5–2010 GM DURAMAX 6.6L LMM (SET OF 8)

S&S Diesel LMM-300SAC-R-SET 300% Over Injector (Reman) — 2007.5–2010 GM Duramax 6.6L LMM

Build a competition-ready LMM with a matched set of eight remanufactured 300% over S&S Diesel injectors. Precision SAC nozzles and OE-grade processes deliver the fuel needed for big turbo(s), dual/stroker CP3 setups, and custom tuning.

Fitment

• 2007.5–2010 Chevrolet Silverado / GMC Sierra 2500HD & 3500HD — 6.6L Duramax LMM
• Set of 8 remanufactured common-rail injectors; 300% over stock flow
• Intended for competition/off-road builds with adequate air and fuel supply

What’s Included

• (8) S&S Diesel reman injectors — LMM-300SAC-R-SET (matched set)
• Balanced flow set with SAC nozzles
• Core return required (typical for reman injector sets)

Recommended Supporting Parts

• GM Duramax Injectors & Nozzles (Category) — compare injector options and components.
• GM Duramax Fuel Lift Pumps (Category) — stabilize supply pressure for high-flow builds.
• Exergy 10mm Stroker CP3 (LMM) — proven high-pressure supply for large injectors.
• Shop All GM Duramax (LB7–L5P) — gaskets, lines, sensors, and install hardware.
• Shop All S&S Diesel at CPP — injectors, pumps, filtration, and more.

Helpful Notes

• Custom tuning is mandatory for 300% over injectors.
• Pair with adequate turbo(s) and high-flow CP3 (dual or stroker) plus a quality lift pump and filtration.
• Fuel contamination kills injectors — use proper filtration and clean install practices.

FAQ

No. These are competition-level injectors that require significant airflow (larger turbo(s)) and custom calibration to operate correctly.

Yes. A high-quality lift pump and a dual or stroker CP3 are strongly recommended to maintain rail pressure and reliability under load.

SAC-style performance nozzles sized 300% over stock, matched as a set for consistent flow.

Absolutely—custom tuning is required to properly command fueling and timing with 300% over injectors.