Audi RS6 Performance C8 Remap & Tuning
Upgrade your Audi RS6 Performance C8 630HP with professional Stage 1 and Stage 2 tuning from Onyx Performance in Slough, Berkshire.
The Audi RS6 Performance C8 uses the 4.0 TFSI V8 mild hybrid petrol engine and responds very well to tuning. Whether you want more performance from a standard car or are planning further upgrades, we can help with the complete setup.
We also offer gearbox tuning, servicing, diagnostics, exhausts, intakes, intercoolers, suspension, brakes, styling and vehicle security.
Suitable for Audi RS6 Performance C8 630HP models from 2023 to 2025.
Audi RS6 Performance C8 Stage 1 Remap
Standard: 630HP / 850Nm
Stage 1: Up to 740HP / 1000Nm
Stage 1 is ideal for a standard or lightly modified Audi RS6 Performance C8. Major engine upgrades are normally not required.
Stage 1 tuning can improve:
- Power and torque
- Throttle response
- Acceleration
- Mid-range performance
- Overtaking performance
- Overall engine response
The car will feel noticeably stronger while remaining smooth and easy to drive every day.
Gearbox tuning is also available where suitable.
Audi RS6 Performance C8 Stage 2 Tuning
Stage 2: Up to 800HP / 1100Nm
Stage 2 is for customers looking for more performance with the correct supporting upgrades.
Typical Stage 2 upgrades can include:
- Performance downpipe or sports catalyst
- Upgraded air intake
- Larger intercooler
- Performance exhaust
- Gearbox tuning
- Other supporting upgrades where required
Already have performance parts fitted? We can check your current setup and advise what else may be required.
Call 01753 439321 to discuss a Stage 2 package.
Power figures are estimated and can vary depending on fuel quality, vehicle condition, software version and modifications fitted.
Audi RS6 Gearbox Tuning
We offer gearbox tuning for compatible Audi RS6 Performance C8 models.
Gearbox tuning can improve:
- Gear change response
- Shift speed
- Torque handling
- Gearbox response
- Power delivery
- How the gearbox works with the increased engine power
We can advise whether gearbox tuning is recommended for your car.
Before Tuning
Every vehicle booked for tuning receives a full diagnostic scan before the remap is carried out.
We check for stored faults and anything obvious that could affect the tuning.
Where required, we may also carry out:
- Smoke testing
- Boost leak checks
- Intake leak checks
- Misfire checks
- Basic engine health checks
If we find a problem that could affect the tuning or reliability of the vehicle, we will discuss it with you before continuing.
Any repairs, replacement parts or further diagnostic work are charged separately and will only be carried out with your approval.
Servicing and Maintenance for Audi RS6 Performance C8
Keep your Audi RS6 Performance C8 properly maintained with servicing and repair work from our Slough workshop.
We offer:
- Oil and filter servicing
- Interim and major servicing
- Spark plug replacement
- Gearbox servicing
- Quattro system servicing where applicable
- Brake repairs and upgrades
- Diagnostics
- Cooling system repairs
- Suspension repairs
- Engine repairs
- General maintenance
Keeping a tuned Audi RS6 properly serviced is important for performance and reliability.
Audi RS6 Performance C8 Exhaust Upgrades
Want your Audi RS6 to sound better?
We can supply and fit:
- Performance exhaust systems
- Cat-back exhaust systems
- Performance downpipes
- Sports catalysts
- Resonator deletes
- Exhaust modifications
- Custom exhaust work
We can help you choose the right setup depending on whether you want something subtle or more aggressive.
Audi RS6 Performance C8 Performance Upgrades
We can supply and fit a wide range of performance upgrades, including:
- Performance air intakes
- Turbo inlet upgrades
- Intercoolers
- Downpipes
- Sports catalysts
- Performance exhausts
- Spark plugs
- Turbo upgrades
- Fuel system upgrades
- Lowering springs
- Coilovers
- Brake upgrades
If you are planning a Stage 2 or higher power setup, speak to us before buying parts. We can help you choose the right upgrades for your target.
Styling and Body Upgrades
Transform the look of your Audi RS6 Performance C8 with a range of styling upgrades.
Options can include:
- Front splitters
- Side skirts
- Rear diffusers
- Spoilers
- Bodykits
- Carbon styling parts
- Black styling parts
- Lowering springs
- Wheel spacers
- Alloy wheel upgrades
Whether you want a clean factory-style look or something more aggressive, speak to our team about the options available.
Audi RS6 Vehicle Security
The Audi RS6 is a desirable performance car, so additional security is worth considering.
We offer:
- Ghost immobilisers
- Vehicle trackers
- Additional immobiliser systems
- Other vehicle security upgrades
Security can be fitted while your Audi RS6 is with us for tuning, servicing or other work.
Why Choose Onyx Performance?
At Onyx Performance in Slough, we can look after the complete Audi RS6.
Our services include:
- ECU remapping
- Gearbox tuning
- Diagnostics
- Servicing
- Mechanical repairs
- Exhaust upgrades
- Intakes
- Intercoolers
- Performance upgrades
- Suspension
- Brakes
- Styling and body upgrades
- Vehicle security
- Alloy wheel refurbishment
This means you can tune, service, repair and upgrade your RS6 in one place.
Audi RS6 Performance C8 Remapping in Slough
Onyx Performance is based in Slough, Berkshire, close to Windsor, Langley, Maidenhead, Heathrow, Uxbridge, West London and surrounding areas.
If you are looking for Audi RS6 Performance C8 remapping in Slough, Audi RS6 Stage 1 tuning, Audi RS6 Stage 2 tuning, Audi gearbox tuning or Audi performance upgrades, contact our team.
Frequently Asked Questions
How much power can an Audi RS6 Performance C8 Stage 1 make?
Our Stage 1 target for the 630HP Audi RS6 Performance C8 is up to 740HP and 1000Nm.
Does Stage 1 need any modifications?
Major hardware upgrades are normally not required for Stage 1. The vehicle should be in good mechanical condition before tuning.
How much power can Stage 2 make?
With the correct supporting upgrades, our Stage 2 target is up to 800HP and 1100Nm.
What upgrades are needed for Stage 2?
Typical upgrades can include an intake, downpipe or sports catalyst, larger intercooler and gearbox tuning.
What ECU does the Audi RS6 Performance C8 use?
The Audi RS6 Performance C8 commonly uses the Bosch MG1CS008 ECU. The exact ECU and software version can vary.
Do you offer gearbox tuning?
Yes. Gearbox tuning is available for compatible Audi RS6 Performance C8 models.
Do you service Audi RS6 models?
Yes. We offer servicing, gearbox servicing, diagnostics, brakes, suspension, engine repairs and general maintenance.
Can you supply and fit performance parts?
Yes. We can help with intakes, intercoolers, exhausts, downpipes, suspension, brakes and other performance upgrades.
Do you fit Ghost immobilisers and trackers?
Yes. We offer Ghost immobilisers, vehicle trackers and other security upgrades, subject to vehicle compatibility.
Stage 3 Tuning: We also offer Stage 3 tuning for selected vehicles and engines. Get in touch to check whether Stage 3 tuning is available for your vehicle and to discuss the supporting upgrades required.
Please note: Some vehicles may require an ECU or TCU unlock before tuning. This may involve an additional cost and turnaround time. We will let you know before carrying out any extra work.
Book Your Audi RS6 Performance C8 Remap
Ready to upgrade your Audi RS6?
Book your Audi RS6 Performance C8 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 – Audi RS6 Performance C8 Remapping and Performance Tuning in Slough, Berkshire.
Contact Onyx Performance
Transform your Audi RS6 Performance C8 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!
