Description
Disclaimer : Cancellations within 24 hours are subject to a cancellation fee. After 24 hours, a higher fee will apply.
Unlock the full potential of your 2020+ Mercedes-Benz GLS63 AMG with the GCA Performance ECU Tune, engineered to deliver substantial power gains, sharper throttle response, and a more exhilarating driving experience. Developed by German Car Accessories (GCA) under our GCA Performance line, this calibration optimizes the factory ECU for increased horsepower, stronger torque delivery, and improved drivability while maintaining smooth everyday operation.
Our custom ECU tune transforms the twin-turbocharged 4.0L M177 V8 by enhancing boost control, ignition timing, and fuel mapping for maximum performance. Whether you're looking for stronger acceleration, improved mid-range pull, or enhanced top-end power, this tune delivers consistent results. GCA Performance also securely backs up your factory ECU software, allowing you to return your vehicle to stock at any time.
Why Choose GCA Performance ECU Tuning?
- Significant horsepower and torque gains
- Sharper throttle response and improved acceleration
- Optimized boost, ignition timing, and fuel delivery
- Enhanced drivability throughout the RPM range
- Factory ECU file securely backed up for easy restoration
- Stage 1 and Stage 2 tuning options available
- Backed by a 1-Year Warranty
Specifications
- Fits: 2020, 2021, 2022, 2023, 2024, 2025, 2026 Mercedes-Benz GLS63 AMG / GLS63 S AMG (X167/W167)
- Engine: 4.0L Twin-Turbo V8 M177
- Stage 1 Tune (Factory Downpipes)
- Stage 2 Tune (GCA Performance Downpipes)
- Downpipe compatibility with check engine light suppression (Off-Road Use Only)
- Enhanced exhaust acoustics with configurable burble settings
- Factory speed limiter removal
- Octane-specific ECU calibration
- Configurable cold start (On/Off)
- 100% reversible with factory ECU backup
- 1-Year Warranty Included
Performance Gains
- Up to +100 HP
- Up to +100 LB-FT Torque
Note: The factory-installed Torque and Horsepower Limiter restricts maximum performance. For full advertised gains, we recommend adding a CPC Module. Without a CPC Module, typical gains are approximately +60 HP and +60 LB-FT of torque.
Tuning Process
- ECU tuning is completed remotely using the supplied tuning cable.
- Detailed installation and tuning instructions are emailed after purchase.
- No permanent ECU modifications are required.
- Factory software can be restored at any time.
Vehicle Fitment
- 2020 Mercedes-Benz GLS63 AMG (X167)
- 2021 Mercedes-Benz GLS63 AMG (X167)
- 2022 Mercedes-Benz GLS63 AMG (X167)
- 2023 Mercedes-Benz GLS63 AMG (X167)
- 2024 Mercedes-Benz GLS63 AMG (X167)
- 2025 Mercedes-Benz GLS63 AMG (X167)
- 2026 Mercedes-Benz GLS63 AMG (X167)
