McLaren GTS Remapping and Tuning

The McLaren GTS features a powerful 4.0 V8 Twin Turbo petrol engine, producing 635 BHP and 630 Nm of torque as standard. Combining impressive performance, luxury and exceptional supercar capability, the McLaren GTS provides an excellent platform for further performance tuning.

At Onyx Performance, we provide professional ECU remapping and performance upgrades for the McLaren GTS. Our tuning options are designed to improve horsepower, torque, throttle response and acceleration while maintaining smooth and consistent power delivery.

Whether you’re looking for a Stage 1 ECU remap or a more comprehensive Stage 2 setup, our team can help you choose the right upgrade for your McLaren GTS.

McLaren GTS Stage 1 Remap

A Stage 1 remap for the McLaren GTS optimises the factory ECU software to improve engine performance without requiring additional hardware modifications.

As standard, the 4.0 V8 Twin Turbo engine produces 635 BHP and 630 Nm of torque. Following a Stage 1 ECU remap, these figures can increase to approximately 700 BHP and 760 Nm of torque.

A Stage 1 remap can deliver several performance improvements, including:

• Increased horsepower
• Increased torque
• Improved throttle response
• Stronger acceleration
• Improved in-gear performance
• Smoother power delivery

Stage 1 tuning is an excellent option for McLaren GTS owners looking to achieve stronger performance while retaining the vehicle’s standard hardware.

McLaren GTS Stage 2 Tuning

Stage 2 tuning for the McLaren GTS takes performance further by combining ECU calibration with suitable supporting hardware upgrades.

With the correct modifications and setup, Stage 2 tuning can increase output to approximately 740 BHP and 800 Nm of torque.

Supporting modifications may include:

• Performance intake systems
• Upgraded intercooling and cooling components where required
• Performance exhaust components
• Improved airflow components
• Supporting hardware appropriate to the chosen setup

Our team can assess your McLaren GTS and recommend suitable supporting modifications before carrying out Stage 2 tuning.

Call for a Stage 2 quote.

Final performance figures depend on supporting modifications, vehicle condition and the chosen setup.

McLaren GTS Gearbox Tuning

Gearbox tuning can complement an ECU remap by optimising transmission behaviour and improving how power is delivered through the drivetrain.

Depending on gearbox compatibility, tuning may provide:

• Improved gearshift response
• Faster gear changes where supported
• Optimised shift behaviour
• Improved transmission response under acceleration
• Better coordination between engine and gearbox performance

Gearbox tuning availability depends on the vehicle’s transmission control system and software compatibility. Our team can check your McLaren GTS before recommending a suitable upgrade.

Before Tuning

Before carrying out any ECU remapping or performance upgrade, we recommend checking the vehicle to ensure it is in suitable condition.

Our pre-tuning checks can include:

• Engine and ECU diagnostics
• Spark plugs and ignition system condition
• Turbochargers and boost system operation
• Intake system and airflow inspection
• Fuel system condition
• Cooling system condition
• General engine health and existing fault-code checks
• Gearbox and drivetrain condition where relevant

These checks help ensure your McLaren GTS is properly prepared for its performance upgrade.

Servicing and Maintenance for McLaren GTS

Regular servicing and maintenance are important for keeping your McLaren GTS performing reliably, particularly when increasing engine output through ECU tuning.

We recommend checking the following components:

• Engine oil and filter replacement
• Spark plug and ignition system checks
• Air filter replacement
• Turbochargers and boost system inspection
• Fuel system checks
• Cooling system inspection
• Diagnostic checks and fault-code investigation

Keeping these systems properly maintained helps support consistent performance and the long-term condition of your McLaren GTS.

McLaren GTS Exhaust Upgrades

An upgraded exhaust system can improve exhaust flow and enhance the sound of your McLaren GTS. Depending on the chosen setup, exhaust upgrades can also complement other performance modifications.

Available exhaust upgrade options may include:

• Performance cat-back exhaust systems
• Sports exhaust components
• Performance downpipes where suitable
• Exhaust systems designed to improve sound and flow

Whether you prefer a more noticeable exhaust note or a performance-focused setup, our team can help you choose suitable components while considering road-use, noise and emissions compliance.

McLaren GTS Performance Upgrades

Alongside ECU remapping, we can help you explore additional performance upgrades for your McLaren GTS.

Available upgrades may include:

• Performance intake systems
• Improved intercooling and cooling components
• Performance exhaust systems
• Supporting turbocharger upgrades where suitable
• Airflow and intake enhancements
• Upgraded braking components
• Suspension upgrades

Whether you’re building a more responsive daily driver or looking to improve performance for more demanding driving, choosing the right supporting upgrades can help achieve your goals.

Our team can help you plan the right combination of performance modifications for your McLaren GTS.

McLaren GTS Styling and Body Upgrades

Enhance the appearance of your McLaren GTS with carefully selected styling and exterior upgrades.

Available styling options may include:

• Front splitters and exterior styling enhancements
• Rear diffusers
• Side skirts
• Rear spoilers
• Alloy wheel upgrades
• Exterior styling details

From subtle exterior enhancements to a more distinctive appearance, we can help you choose styling upgrades that complement your McLaren GTS.

McLaren GTS Vehicle Security

Protecting your McLaren GTS is just as important as improving its performance. We can help you explore additional vehicle security solutions for greater peace of mind.

Available security options may include:

• Ghost immobilisers
• Advanced immobiliser systems
• Vehicle tracking systems
• Additional vehicle security solutions

Our team can discuss suitable security upgrades for your McLaren GTS and help you choose a solution that meets your requirements.

Why Choose Onyx Performance?

At Onyx Performance, we provide professional vehicle tuning and performance services designed to help you get the most from your vehicle.

Our services include:

• Stage 1 ECU remapping for improved power and torque
• Stage 2 tuning with suitable supporting modifications
• Gearbox tuning, where vehicle compatibility is confirmed
• Servicing and maintenance to help keep your vehicle in good condition
• Diagnostics and health checks before performance upgrades
• Performance exhaust systems to enhance sound and exhaust flow
• Intake and intercooler upgrades to support increased performance
• Styling, braking and suspension upgrades to enhance your vehicle
• Vehicle security solutions including immobilisers and tracking systems

From ECU remapping to performance hardware, styling and security, Onyx Performance can help you plan the right upgrades for your McLaren GTS.

McLaren GTS Remapping in Slough

Onyx Performance provides McLaren GTS remapping and performance services in Slough, Berkshire.

Whether you’re interested in a Stage 1 ECU remap, Stage 2 tuning, gearbox tuning or supporting performance upgrades, our team can help you choose the right solution for your vehicle.

Contact our team to discuss your McLaren GTS requirements and arrange your tuning service.

Frequently Asked Questions

1. How much power can a McLaren GTS gain from a Stage 1 remap?

The standard 4.0 V8 Twin Turbo engine produces 635 BHP and 630 Nm of torque. A Stage 1 remap can increase output to approximately 700 BHP and 760 Nm, depending on vehicle condition and setup.

2. Can my McLaren GTS have Stage 2 tuning?

Yes, Stage 2 tuning may be available with suitable supporting modifications. With the correct setup, output can increase to approximately 740 BHP and 800 Nm of torque.

Call for a Stage 2 quote.

3. Does a Stage 1 remap require additional modifications?

No. Stage 1 tuning is generally designed to work with the vehicle’s standard hardware. It optimises the factory ECU software to improve power, torque and throttle response without requiring additional performance parts.

4. Can the gearbox also be tuned?

Yes, gearbox tuning may be available depending on the transmission control system and software compatibility. It can improve shift response and optimise transmission behaviour to complement the engine remap.

5. Will my vehicle be checked before remapping?

Yes. We recommend carrying out diagnostic checks and inspecting the engine, turbochargers, ignition system, intake, fuel system and cooling components before tuning. This helps identify any existing issues before performance modifications are carried out.

6. Can I upgrade the exhaust system?

Yes. We can help you explore suitable exhaust upgrades, including sports exhaust components, cat-back systems and performance downpipes where appropriate. The correct setup will depend on your performance goals and road-use requirements.

7. Can Onyx Performance supply performance and styling upgrades?

Yes. We can help with performance intake systems, exhaust upgrades, cooling components, braking and suspension upgrades, exterior styling and vehicle security solutions.

8. What is Stage 3 tuning?

Stage 3 tuning generally involves more extensive hardware modifications, potentially including upgraded turbocharger components and additional supporting modifications. The exact requirements depend on the vehicle and the intended performance target.

9. Will my ECU or TCU need unlocking?

ECU and TCU access requirements depend on the vehicle’s software version and control-unit security. The McLaren GTS uses a Bosch ME17.8.33 ECU. We will need to confirm the exact ECU software and access requirements before tuning. Gearbox control unit access will be checked separately where gearbox tuning is required.

Book Your McLaren GTS Remap

Ready to upgrade your McLaren GTS?

Book your McLaren GTS Stage 1 remap with Onyx Performance in Slough, or contact us to discuss Stage 2 tuning and supporting upgrades.

We can also help with gearbox tuning, servicing, diagnostics, exhausts, intakes, intercoolers, performance parts, styling, brakes, suspension and vehicle security.

Call: 01753 439321

Monday-Friday: 10AM-6PM

Saturday: 10AM-3PM

Onyx Performance – McLaren GTS Remapping and Performance Tuning in Slough, Berkshire.

Contact Onyx Performance

Transform your McLaren GTS today with Onyx Performance. Whether you’re looking for Stage 1 or Stage 2 remapping, performance exhaust systems, styling enhancements, or vehicle security solutions, our expert team is here to help.

📞 Call us now on 01753 439321 to book your tuning service or discuss Stage 2 and security options!