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 2012-2015 Mercedes-Benz GL63 AMG X166/W166 with the GCA Performance ECU Tune. Engineered with a performance-first mindset, this custom ECU calibration transforms the way your AMG SUV responds, accelerates, and delivers power.
Designed specifically for the 5.5L Twin Turbo V8 M157 engine, the GCA Performance tune optimizes throttle response, torque delivery, and overall engine performance. Experience stronger acceleration, improved mid-range power, and a sharper throttle feel throughout the entire RPM range.
This is more than a simple power upgrade — it is a complete enhancement of your driving experience. Every aspect of the engine calibration is refined to provide stronger pulls, improved efficiency, and more consistent power delivery while maintaining everyday drivability.
GCA Performance securely saves your original ECU data, allowing you to restore your GL63 AMG back to factory settings at any time. With support for both Stage 1 and Stage 2 tuning, this calibration can be tailored to your setup, whether you are running factory downpipes or upgrading with GCA Performance Downpipes.
Features & Benefits
- Designed by German Car Accessories under the GCA Performance line
- Custom ECU tuning for Mercedes-Benz GL63 AMG X166/W166
- Optimized throttle response and acceleration
- Increased horsepower and torque output
- Improved turbocharger response and performance
- Enhanced power delivery throughout the RPM range
- Octane-specific calibration based on fuel quality
- Factory speed limiter removal
- Adjustable exhaust burble settings
- Configurable cold start behavior (On/Off)
- Downpipe readiness with check engine light suppression (for off-road use only)
- Stage 1 and Stage 2 tuning available
- Factory ECU data securely saved
- 100% reversible back to stock settings
- Remote ECU tuning via provided cable
- Backed by a 1-Year Warranty
Tuning Specs
- Fits: 2012 2013 2014 2015 X166/W166 Mercedes-Benz GL63 AMG
- Engine: 5.5L Twin Turbo V8 M157 Engine
- Stage 1: Designed for vehicles with factory downpipes
- Stage 2: Designed for vehicles equipped with GCA Performance Downpipes
- Horsepower Gain: Up to +120 HP
- Torque Gain: Up to +150 TQ
Tuning Instructions
- Once purchased, tuning instructions will be emailed to you.
- The vehicle can be tuned remotely using the provided cable.
- Stage selection will be confirmed through the tuning instructions based on your vehicle setup.
- Stage 2 tuning is available at no additional charge when required.
