S&S Diesel Motorsport injectors for the 2006–2007 LBZ Duramax, available as individual injectors or complete sets of 8. Built to a precision standard that goes far beyond standard aftermarket injectors — from TorqueMaster stock replacement through 500% over for full competition builds.

What separates S&S LBZ injectors from everything else on the market is the level of precision engineering behind every set. S&S uses a proprietary nozzle honing process for clean and consistent holes, with nozzles flow-matched to 1% variance per set using OE standards — Viscor SAE-J967 fluid, 40°C, 100 bar. Complete injectors are flow-matched to 3% variance per set at four different pressure and energizing points per injector, with injection profiles (rate shapes) aligned across the set. Injector build spec is custom-matched to the nozzle flow rate for each individual size. At 250% over (3200 cc/min) and above, internal body modifications are included to compensate for the increased nozzle flow that slows open and closing times — improving the injection rate shape at extreme output levels.

Both brand new and Bosch remanufactured bodies are available. S&S uses reman bodies direct from Bosch — not Bosch-certified remans — for quality control purposes. This distinction matters and is why S&S reman injectors carry the same 2-year warranty as new.

Available flow rates and their intended applications:

TorqueMaster Stock (LBZ-10SAC / LBZ-10SAC-SET) — S&S stock replacement engineered for maximum low-end torque, drivability, and reliability. The right choice for daily drivers and towing applications.
30% Over (LBZ-30SAC / LBZ-30SAC-SET) — Mild performance upgrade for lightly modified trucks.
45% Over (LBZ-45SAC / LBZ-45SAC-SET) — Strong mid-level upgrade for trucks with turbo and airflow improvements.
60% Over (LBZ-60SAC / LBZ-60SAC-SET) — Designed for aggressive street setups requiring upgraded fuel system support.
80% Over (LBZ-80SAC / LBZ-80SAC-SET) — High-performance territory requiring significant supporting modifications.
100% Over (LBZ-100SAC / LBZ-100SAC-SET) — Serious performance builds with upgraded CP3, lift pump, and tuning.
150% Over (LBZ-150SAC / LBZ-150SAC-SET) — Competition-level fueling for highly modified engines.
200% Over (LBZ-200SAC / LBZ-200SAC-SET) — Extreme fueling for advanced race builds.
250% Over (LBZ-250SAC / LBZ-250SAC-SET) — 3200 cc/min. Includes internal body modifications for improved injection rate shape.
300% Over (LBZ-300SAC / LBZ-300SAC-SET) — Dedicated competition application with body modifications.
350% Over (LBZ-350SAC / LBZ-350SAC-SET) — Maximum fueling for advanced race builds with body modifications.
400% Over (LBZ-400SAC / LBZ-400SAC-SET) — Full competition configuration with body modifications.
450% Over (LBZ-450SAC / LBZ-450SAC-SET) — Purpose-built extreme output with body modifications.
500% Over (LBZ-500SAC / LBZ-500SAC-SET) — Maximum effort competition injector. Purpose-built engines only. Includes body modifications.

All new and reman options available across the full lineup. Each size available as a single injector or complete set of 8. Note: the LBZ Duramax uses 8 injectors — order a quantity of 8 singles or select the SET variant for a complete engine set.

Larger flow rates require an upgraded or modified CP3, dual CP3 system, lift pump upgrades, turbocharger or compound setup upgrades, and custom tuning calibrated specifically for your injector size. Oversizing injectors without proper supporting components results in poor drivability and excessive smoke. When properly matched these injectors deliver clean, controlled power.

Not sure which size is right for your setup? Contact us at info@hardwayperformance.com with your year, overall use, turbo combination, and HP goals and we will make a recommendation.

Core return required. A $150 charge applies if no core is returned. Send cores directly to S&S Diesel Motorsport, not to Hardway.

S&S Diesel Motorsport LLC,
Attn: Cores/Hardway,
1471 W Tipton St,
Seymour, IN 47274.