Mercedes
AMG GT R
2021 ECU TUNE
Engineered for the 2021 Mercedes AMG GT R by our in-house team. Feel the difference of up to +83 horsepower and sharper throttle response.
Performance Stages
Stage 1
AvailableECU Calibration — Software Only
Stage 2
AvailableECU Calibration — Software Only
Available Add-ons
Enhance your calibration
Calibration Details
In-House Powertrain Calibration
With the first calibration level, output rises by up to 70 HP / 71 PS and 123 lb-ft / 167 Nm to an estimated 647 HP / 656 PS and 639 lb-ft / 867 Nm.
With the second calibration level, output rises by up to 83 HP / 84 PS and 143 lb-ft / 194 Nm to an estimated 660 HP / 669 PS and 659 lb-ft / 894 Nm.
ECU Multi-Map Switching
ECU Multi-Map Switching enables the driver to select between multiple independent calibration sets stored in the ECU, allowing on-the-fly changes to engine behavior without stopping the car or re-flashing. Rather than relying on a dedicated hardware switch, this functionality can be implemented through existing in-cabin controls, such as brake plus accelerator, or brake plus cruise-control set.
AMG C190 8SPD TCU Calibration
Our AMG TCU Calibration Upgrade delivers faster gear changes, more responsive downshifts, and improved gear holding during acceleration.
Optimized to complement our ECU calibration, it improves power delivery while maintaining smooth everyday drivability.
Customer Reviews
What our clients say
"If your looking for the fastest and most Reliable McLaren in the World then M3P is your place! Ask for Nate he was very helpful and Knowledgeable and everything turned out just like I wanted. Highly Recommend!!"
"very professional and they know their stuff! highly recommend! call nate, he will take care of you! thanks again guys."
"M3P took my McLaren to the next level! Safa and Nate were incredibly professional and provided work that is second to none. If you are looking to add more juice to your McLaren or AMG, M3P is the place to be. Thanks guys for the great work."
"I have been dealing with Safa for 2 years since owning my McLaren 650S. He is the reason for my continued McLaren ownership as I confidently know I am in great hands with someone knowledgeable and trustworthy! I'm tuned by Safa and the car has ran flawless for 10k+ miles. In addition his crew Nate and Josh are awesome guys and they all feel like family. Couldn't ask for a better shop or people to deal with. Proud to be Mega Strong 💪"
"I brought my AMG in for a bit of routine maintenance, as well as some slight performance modifications. 10/10 recommend, Mega 3 Performance is exceedingly competent on a variety cars and took fantastic care of my car. Their fabrication work is next level, and their technicians are very knowledgeable. I will be using Mega 3 for all of my performance and maintenance moving forward over the Mercedes dealership."
Frequently Asked Questions
Common questions about tuning the 2021 Mercedes AMG GT R.
A Stage 1 ECU calibration on the 2021 Mercedes Amg Gt R can deliver up to +70 Horsepower and +123 ft-lbs of Torque over the stock figures. Actual results may vary, but expect noticeably improved acceleration, a smoother powerband, and sharper throttle response.
Our Stage 1 calibration is designed to operate within safe engine parameters without triggering fault codes. We recommend consulting with us about your specific situation and warranty coverage before proceeding.
Our Stage 1 calibration for the 2021 Amg Gt R is a software-only upgrade. You do not need any mechanical modifications, making it a clean, reversible performance improvement that works on your stock vehicle.
No, our custom ECU calibration for the 2021 Amg Gt R is engineered to enhance throttle response and smooth out the powerband. The result is better drivability in everyday traffic, as well as a more engaging experience during spirited driving.