Stage 2 S3 8V 2.0 TFSI CJXC — Simos 18.1 SC800O3000000 Siemens — ECU Tuning 8V0906259F

• Initial release of a Stage 2 tuning package for the Audi S3 8V (Simos 18.1).
• Includes both a standard Stage 2 and a decat version for track-prepared vehicles.
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• Package includes three files: Original, Stage 2 (Vmax Off), and Stage 2 (Vmax Off + Decat).
• Confirm ECU number 8V0906259F and software SC800O3000000 before flashing.
• IMPORTANT: Stage 2 requires a high-flow downpipe for correct operation. An upgraded intercooler is also recommended.
• The Decat file requires physical removal of the catalyst to prevent damage.
• For off-road or competition use ONLY.​