Mercedes-AMG G 63 Stage 1 Performance Upgrade by DEIZ GARAGE
Mercedes-Benz G-Class AMG II (W463)•
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Mercedes-AMG G 63 (2026) received a Stage 1 ECU calibration delivering +100 hp and +180 Nm over stock.
The upgrade is focused on increasing power and torque while maintaining factory drivability. Throttle response is improved, mid-range pull becomes stronger, and overall performance feels more responsive across the RPM range.
All calibrations are dyno-tested and optimized for safe operation under load. The software is developed to ensure stable performance without exceeding safe operating parameters.
The Stage 1 software is applied with warranty retention and remains fully compatible with OEM systems.
The result is stronger acceleration and improved responsiveness while preserving stability and everyday usability.
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