Stage 2 Focus ST 2.0T — MED17.2.2 Bosch — ECU Files 12B684

Change log

  • v1.0 — 2025-07-28
    • Initial release of a Stage 2 tuning package for the Ford Focus ST (MED17.2.2).
    • Includes two different Stage 2 variations to suit driver preference.

Release notes

  • v1.0 — 2025-07-28
    • Package includes three files: Original, Stage 2, and Stage 2 v2.
    • Confirm ECU numbers (Prod: CM5A-14C204-AMP, ECU: BB5A-12B684-AC) before flashing.
    IMPORTANT: Stage 2 requires a high-flow downpipe and upgraded intercooler for correct operation.
    • Designed for a mechanically modified vehicle; high-octane fuel required.
    • For off-road or competition use ONLY.​
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