2025 Mclaren
GTS
Unlock what the factory left on the table. Our in-house calibrations for the 2025 Mclaren GTS deliver +68HP & +80TQ, no hardware required.
Calibration Details
In-House Powertrain Calibration
The 2025 McLaren GTS continues with the proven M840TE 4.0-liter twin-turbocharged V8 producing 631 HP and 479 ft-lbs, positioned as a sportier alternative to the standard GT with enhanced throttle response, revised suspension calibration, and a more engaging driving character. Our team at Mega 3 Performance has calibrated this platform extensively and understands exactly where the factory leaves performance untapped.
Our Stage 1 calibration for the 2025 GTS delivers +68 HP and +80 TQ, raising total output to approximately 699 HP and 559 ft-lbs. We optimize boost pressure curves, advance ignition timing for 93 octane fuel, and refine the throttle mapping to complement the GTS's sport-oriented factory tune. The gains enhance the car's already engaging character, sharper acceleration response, a more authoritative mid-range, and increased highway passing power. Stage 2 pushes to 716 HP and 609 TQ for maximum grand touring performance. All calibrations are engineered and tested in-house by Mega 3 Performance, backed by 500+ McLaren projects and 15+ years of tuning expertise. ECU map switching and antilag available as add-ons, with worldwide service through remote flash.
Performance Stages
Stage 1
Available750S Models must have 830 operating system
Stage 2
Available750S Models must have 830 operating system
Tuning through Stage 1 & Stage 2 ECU calibration works to improve horsepower, torque, and overall engine responsiveness. By optimizing the engine management system, we unlock the true potential of your vehicle, delivering a smoother powerband, enhanced throttle response, and a dramatically more engaging driving experience, all while maintaining factory reliability and safety parameters.
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 2025 Mclaren GTS.
A Stage 1 ECU calibration on the 2025 Mclaren Gts adds approximately +68 Horsepower and +80 ft-lbs of Torque over the stock figures, delivering noticeably improved acceleration and 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 2025 Gts 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 2025 Gts 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.
McLaren packages
Choose from our three-tiered McLaren performance package system, designed to deliver unprecedented power and reliability. Each package includes comprehensive engineering, custom components, and professional calibration.