Volkswagen Golf GTI Mk8 Remapping and Tuning
Unlock the full potential of your Volkswagen Golf GTI Mk8 (2.0 TSI Engine) with Onyx Performance, based in Slough, Berkshire, just outside West London. Whether you’re looking for a simple power increase or a full Stage 2 upgrade, we offer expert ECU remapping, DSG tuning, servicing, performance upgrades, and vehicle security solutions tailored specifically for your Golf GTI Mk8.
Our tuning packages are customised for both manual and DSG models, ensuring maximum performance while maintaining reliability.
Volkswagen Golf GTI Mk8 Stage 1 & Stage 2 – Power Gains
Stage 1 – Power Gains:
Stock Power: 245HP / 370Nm (varies by model)
Stage 1 Remap: 310HP / 450Nm
Hardware Required: None
Our Stage 1 remap delivers a significant power and torque boost with no additional hardware required. Combined with Onyx Stage 1 DSG Software (for DSG models), your Golf GTI Mk8 will have optimised gear shifts, enhanced throttle response, and a sharper driving experience.
🔧 Spark Plug and Ignition Coil Upgrade: Highly recommended for Stage 1 tuning to improve ignition performance, enhance reliability, and ensure consistency under increased power loads.
Stage 2 – Power Gains:
Stage 2 Remap: 350HP / 500Nm
Hardware Required:
🔧 Decat Downpipe or High-Flow Sports Catalyst
🔧 Cat-Back Exhaust System (Optional but highly recommended)
🔧 Upgraded Air Filter
🔧 Larger Intercooler
🔧 Onyx Stage 2 DSG Software (Recommended for DSG models)
🔧 Spark Plug and Ignition Coil Upgrade (Essential for improved ignition and reliability under higher boost pressure)
Stage 2 tuning builds upon the Stage 1 foundation with essential hardware upgrades that increase airflow, improve cooling, and optimise turbo efficiency, ensuring even greater power gains and sharper throttle response.
Performance figures may vary depending on installed hardware and fuel quality.
Looking for Even More Power?
For enthusiasts seeking ultimate performance, we offer Stage 3 tuning packages featuring hybrid turbo upgrades, upgraded fuel systems, and additional supporting modifications for even greater power and torque.
📞 Call us on 01753 439321 to discuss Stage 3 options!
Why Choose Onyx Performance?
✔ Rolling Road (Dyno) Testing for precise power measurement
✔ Data Logging and Diagnostics to ensure optimal engine performance
✔ Before and After Performance Printouts
✔ Engine Smoke Tests to check for Boost/Vacuum Leaks
✔ Optional Features: Overrun Crackles, Speed Limiter Removal, and Catalyst Fault Code Deletes
Our expert team ensures your Volkswagen Golf GTI Mk8 delivers improved power, torque, and response, while maintaining engine safety and drivability.
Exhaust Upgrades for Volkswagen Golf GTI Mk8
Enhance the sound and performance of your Golf GTI Mk8 with a high-performance exhaust system:
🔧 Decat Downpipes – Improves turbo efficiency and exhaust flow for maximum power
🔧 High-Flow Sports Catalysts – Reduces backpressure while remaining emissions compliant
🔧 Cat-Back Exhaust Systems – Enhances exhaust tone and sound quality
🔧 Resonator Deletes – Adds a sportier, aggressive exhaust note
Pairing Stage 2 tuning with a decat downpipe or high-flow sports catalyst allows for maximum power gains and an enhanced exhaust note.
Servicing and Maintenance for Volkswagen Golf GTI Mk8
Keeping your Volkswagen Golf GTI Mk8 in peak condition is essential for long-term reliability. At Onyx Performance, we offer:
🔧 Routine Servicing: Oil changes, filter replacements, and essential inspections
🔧 Brake Repairs and Upgrades: OEM replacements and performance brake kits
🔧 Suspension Maintenance: Checks and optimisations for handling and ride comfort
🔧 Diagnostics and Fault Repairs: Advanced system scans to prevent potential issues
With our expertise in Volkswagen performance models, you can trust Onyx Performance to maintain and enhance your vehicle with precision and care.
Styling, Performance Upgrades & Vehicle Security
Elevate your Volkswagen Golf GTI Mk8 with custom styling, performance upgrades, and vehicle security solutions tailored to your needs:
Styling and Performance Upgrades:
🔧 Aero Kits & Carbon Fibre Components – Aggressive styling and improved aerodynamics
🔧 Lowering Springs & Coilovers – Enhanced handling and stance
🔧 Big Brake Kits – Superior stopping power for track and road use
Vehicle Security Solutions:
🔒 Autowatch Ghost Immobilisers – Prevents key cloning and unauthorised starts
🔒 MetaTrak Trackers – Live GPS tracking with mobile app integration
🔒 Scorpion Track Systems – Motion alerts and driver recognition for ultimate protection
🔒 Fleet Trackers – Ideal for multiple high-value vehicles with monitoring features
Our security systems are professionally installed to provide seamless integration and maximum protection.
10 Frequently Asked Questions About Volkswagen Golf GTI Mk8 Tuning
- How much power does a Stage 1 remap give my Golf GTI Mk8?
Stage 1 tuning increases power to 310HP and 450Nm, with no hardware modifications required. - What upgrades are required for Stage 2 tuning?
Stage 2 tuning requires a decat downpipe or high-flow sports catalyst, upgraded air intake system, larger intercooler, and a spark plug and ignition coil upgrade. - Will remapping my Golf GTI affect reliability?
No, our tuning is designed to increase performance while maintaining engine reliability, provided the car is well maintained. - How long does it take to remap my Golf GTI Mk8?
Stage 1 tuning can be done on the same day, while Stage 2 may take longer due to hardware installations. - Does remapping my car void the warranty?
Yes, ECU tuning can void the manufacturer’s warranty, but we offer reversible tuning options. - Can I return my car to stock settings if needed?
Yes, we can restore your ECU back to factory settings if required. - Do you offer finance options for tuning?
Yes, we offer flexible finance plans over 4 monthly payments. - Will Stage 2 tuning make my exhaust louder?
Yes, especially when paired with a decat downpipe or high-flow sports catalyst. - Can DSG tuning be done with ECU remapping?
Yes, DSG tuning is highly recommended for smoother shifts and better power delivery. - Where is Onyx Performance located?
We are based in Slough, Berkshire, just outside West London.
Contact Onyx Performance
📞 Call us now on 01753 439321 to book your tuning service or discuss Stage 2 and security options!
Tags:
Volkswagen Golf GTI Mk8 tuning in Slough
Volkswagen Golf GTI Stage 1 remap (310HP / 450Nm)
Volkswagen Golf GTI Stage 2 tuning with performance exhaust (350HP / 500Nm)
Downpipe upgrades for Volkswagen Golf GTI Mk8
Servicing and maintenance for Volkswagen Golf GTI
Vehicle security for Volkswagen with trackers and immobilisers
Big brake kits for Volkswagen Golf GTI Mk8
Unlock the true potential of your Volkswagen Golf GTI Mk8 today!
