Audi S8 4.0 TFSI V8 520HP Remapping by Onyx Performance
At Onyx Performance, we offer meticulously developed ECU and DSG tuning solutions for the Audi S8 4.0 TFSI V8 520HP. Our Stage 1 and Stage 2 software have been extensively tested on our 4WD rolling road dyno, ensuring maximum power gains, enhanced drivability, and long-term reliability.
Whether you’re looking to unlock additional power with Stage 1 or push the limits with Stage 2 performance tuning, our expert custom ECU and gearbox remaps provide outstanding results while maintaining engine integrity.
Audi S8 4.0 TFSI V8 520HP Remap Service Includes:
✔ Rolling Road (Dyno) Testing – Accurately measuring performance before & after tuning
✔ Live Data Logging – Ensuring ECU calibration is optimised for power, response, and reliability
✔ Before & After Performance Printouts – Providing transparent, measurable power gains
✔ Engine Smoke Test – Checking for boost or vacuum leaks before tuning
✔ Catalyst Efficiency Fault Code Delete (OPTIONAL) – Prevents MIL errors after exhaust modifications
✔ Sport Mode Overrun Crackles (OPTIONAL) – Enhances exhaust acoustics on deceleration
✔ Speed Limiter Removal – Unlocks the vehicle’s full potential
✔ Comprehensive Diagnostic Check – Ensuring engine and drivetrain health before tuning
Audi S8 4.0 TFSI V8 – Stage 1 & Stage 2 Performance Gains
Stage 1 Remap – Enhanced Power Without Hardware Changes
- Stock Power: 520HP / 650Nm
- Stage 1 Output: 650HP / 950Nm
- Hardware Required: None
A Stage 1 remap optimises the factory ECU software, delivering significant improvements in power, throttle response, and turbo efficiency. Expect quicker acceleration, smoother power delivery, and sharper throttle sensitivity, all while maintaining the vehicle’s OEM reliability.
Stage 2 Remap – Maximum Performance Upgrade
- Stock Power: 520HP / 650Nm
- Stage 2 Output: 680-720HP / 1000Nm*
- Hardware Required:
- Decat Downpipe or High-Flow Sports Catalyst (Maximises turbo efficiency & exhaust flow)
- Cat-Back Exhaust System (Optional for Enhanced Sound & Performance)
- Upgraded Air Filter for Increased Airflow
- Larger Intercooler for Improved Cooling & Power Stability
- Onyx Performance Stage 2 Gearbox Software (Enhances gear shifts, launch control, and torque management)
Stage 2 tuning unleashes the full potential of the Audi S8, increasing power output, refining throttle response, and enhancing the overall driving experience while maintaining reliability.
Figures may vary depending on modifications and fuel quality.
Exhaust Upgrades for Audi S8 4.0 TFSI V8
Enhance the sound and performance of your Audi S8 with our performance exhaust upgrades:
? Decat Downpipes – Maximises turbo efficiency and increases exhaust flow
? High-Flow Sports Catalysts – Reduces backpressure while maintaining emissions compliance
? Cat-Back Exhaust Systems – Enhances overall exhaust tone and driving experience
? GPF (Gasoline Particulate Filter) Delete – Recommended for maximum performance and sound improvement
Pairing Stage 2 tuning with a performance exhaust system ensures maximum power gains and an aggressive exhaust note.
Servicing & Maintenance for Audi S8 4.0 TFSI V8
Keeping your Audi S8 in optimal condition is essential for long-term performance and reliability. At Onyx Performance, we offer:
? Routine Servicing – Oil changes, filter replacements, and inspections to maintain performance
? Brake Upgrades & Repairs – OEM brake replacements and high-performance braking systems
? Suspension Enhancements – Improved handling, ride stability, and suspension checks
? Advanced Diagnostics & Fault Repairs – Identifying and resolving engine and drivetrain issues
We also update your digital service history, ensuring your vehicle remains fully documented and well-maintained.
Vehicle Security & Immobilisers for Audi S8 4.0 TFSI V8
Protect your Audi S8 with our advanced security and immobiliser solutions:
? Autowatch Ghost Immobiliser – Prevents key cloning and unauthorised vehicle starts
? MetaTrak Trackers – GPS tracking for real-time vehicle monitoring
? Scorpion Track Systems – Motion alerts and driver recognition for added security
? Fleet Tracking Solutions – Ideal for monitoring multiple high-value vehicles
Our security systems are professionally installed, offering seamless integration and maximum protection.
Why Choose Onyx Performance for Audi S8 4.0 TFSI V8 Tuning?
✔ Specialists in Audi 4.0 TFSI Engine Tuning – Expertise in high-performance Audi models
✔ Dyno-Tested ECU & DSG Software – Developed in-house on our 4WD rolling road dyno
✔ Custom ECU & DSG Tuning – Optimised throttle response, turbo boost control, and gearbox calibration
✔ Full Vehicle Health Check Before Tuning – Ensuring engine safety and long-term reliability
✔ Flexible Finance Options Available – Making high-performance tuning more accessible
Unlock the Full Potential of Your Audi S8 4.0 TFSI V8 with Onyx Performance
Whether you’re looking for a Stage 1 remap for improved drivability or Stage 2 tuning for maximum power and performance, Onyx Performance provides the ultimate tuning solutions for your Audi S8 4.0 TFSI V8.
? Located in Slough, Berkshire – Serving Audi performance enthusiasts across the UK
? Contact us today to book your remap and experience the ultimate performance upgrade!
? Maximise your Audi S8’s potential with Onyx Performance! ?