Audi RS3 8P 2.5 TFSI Remapping & Performance Tuning by Onyx Performance
At Onyx Performance, we offer expertly developed ECU and DSG tuning for the Audi RS3 8P 2.5 TFSI 340HP, designed to deliver significant power gains, enhanced throttle response, and improved drivability. Our Stage 1 and Stage 2 remap software is developed and tested on our state-of-the-art 4WD rolling road dyno, ensuring the best performance without compromising reliability.
Whether you’re looking for a refined yet powerful upgrade with Stage 1 tuning or want to maximise performance with supporting hardware upgrades in Stage 2, we have the perfect tuning solution for your Audi RS3 8P.
Audi RS3 8P 2.5 TFSI Remap Service Includes:
✔ Rolling Road (Dyno) Session – Measured power before and after tuning
✔ Data Logging & Performance Monitoring – Ensuring precise tuning adjustments
✔ Before & After Power Printouts – Transparent and verifiable performance gains
✔ Engine Smoke Test – Checking for boost and vacuum leaks before tuning
✔ Catalyst Efficiency Fault Code Delete (OPTIONAL) – Prevents warning lights when using sports catalysts or decat systems
✔ Sport Mode Overrun Crackles (OPTIONAL) – Enhances the exhaust note on deceleration
✔ Speed Limiter Removal – Unlocks the full performance potential
✔ Cold Start Delete (OPTIONAL) – Reduces excessive cold-start noise
✔ Comprehensive Diagnostic Check – Identifies and resolves any underlying issues before tuning
Audi RS3 8P 2.5 TFSI Stage 1 & Stage 2 Tuning – Power Gains
Stage 1 Remap – Performance Upgrade
- Stock Power: 340HP / 450Nm
- Stage 1 Output: 410-420HP / 600Nm
- Hardware Required: None
A Stage 1 ECU remap delivers a massive power increase with no additional hardware required. It optimises turbo efficiency, throttle response, and power delivery, creating a more engaging and dynamic driving experience.
Stage 2 Remap – Maximum Performance Upgrade
- Stock Power: 340HP / 450Nm
- Stage 2 Output: 420-450HP / 620-650Nm*
- Hardware Required:
- Decat Downpipe or High-Flow Sports Catalyst (For improved exhaust flow and power gains)
- Cat-Back Exhaust System (Optional for Enhanced Sound & Performance)
- Upgraded Air Filter for Increased Airflow
- Larger Intercooler for Improved Cooling Efficiency
- Onyx Performance Stage 2 DSG Software (For optimised gear shifts and launch control on DSG models)
Stage 2 tuning refines power delivery and turbo efficiency, ensuring maximum performance while maintaining reliability.
Power figures may vary depending on modifications and fuel quality.
Exhaust Upgrades for Audi RS3 8P 2.5 TFSI
Upgrading your exhaust system is one of the best ways to enhance performance and sound. We offer:
? Decat Downpipes – Reduces exhaust restriction for increased turbo spool
? High-Flow Sports Catalysts – Improves exhaust flow while remaining emissions compliant
? GPF (Gasoline Particulate Filter) Delete – Recommended for maximum sound and power output
? Cat-Back Exhaust Systems – Enhances the exhaust tone and driving experience
Pairing Stage 2 tuning with a decat downpipe or high-flow sports catalyst ensures optimum performance and a more aggressive exhaust note.
Servicing & Maintenance for Audi RS3 8P
Keeping your Audi RS3 8P in peak condition is essential for long-term reliability and performance. At Onyx Performance, we offer:
? Routine Servicing – Oil changes, filter replacements, and general maintenance
? Brake Upgrades & Repairs – High-performance brake kits and OEM replacements
? Suspension Checks & Upgrades – Handling enhancements and setup optimisations
? Advanced Diagnostics & Fault Repairs – Identifying and resolving performance-related issues
We also update your digital service history, ensuring your Audi remains well-documented and maintained.
Vehicle Security & Immobilisers for Audi RS3 8P
Protect your Audi RS3 8P with state-of-the-art security solutions:
? Autowatch Ghost Immobiliser – Prevents key cloning and unauthorised starts
? MetaTrak Trackers – Live GPS tracking with real-time location monitoring
? Scorpion Track Systems – Anti-theft motion alerts and driver recognition
? Fleet Tracking Solutions – Ideal for multiple high-value vehicles
Our security solutions are professionally installed for seamless integration and maximum protection.
Why Choose Onyx Performance for Your Audi RS3 8P Tuning?
✔ Specialists in Audi 2.5 TFSI Tuning – Extensive experience in optimising performance for Audi RS and S models
✔ Dyno-Tested Remaps – All software is tested in-house on our 4WD rolling road dyno
✔ Custom ECU & DSG Tuning – Enhanced throttle response, turbo boost control, and power delivery
✔ Comprehensive Health Check Before Tuning – Ensuring engine safety and long-term reliability
✔ Flexible Finance Options Available – Making high-performance tuning more accessible
Transform Your Audi RS3 8P with Onyx Performance
Whether you’re looking for Stage 1 for improved responsiveness or Stage 2 for maximum performance, Onyx Performance has the perfect tuning solution for your Audi RS3 8P.
? Located in Slough, Berkshire – Serving Audi tuning enthusiasts across the UK
? Contact us today to book your remap and unlock the full potential of your Audi RS3 8P!
? Experience the power of precision tuning with Onyx Performance! ?