Mercedes-AMG C63 (W204) Remapping and Tuning – Pre-Facelift & Facelift Variants
Unlock the full potential of your Mercedes-AMG C63 (W204 – 6.2L V8 NA, 2008–2015) with Onyx Performance, based in Slough, Berkshire, just outside West London. Whether you own a pre-facelift (2008–2011) or facelift (2011–2015) variant, our custom ECU remapping, servicing, and performance upgrades will enhance power, torque, and overall drivability, all while maintaining reliability.
Our custom-tailored tuning solutions ensure maximum performance from the legendary M156 6.2L naturally aspirated V8 engine, delivering sharper throttle response, improved torque, and a more exhilarating driving experience.
Mercedes-AMG C63 (W204) Stage 1 & Stage 2 – Power Gains
Stage 1 – Power Gains:
- Stock Power (Pre-Facelift & Facelift Models): 457HP / 600Nm
- Stock Power (C63 Performance Pack Models): 487HP / 600Nm
- Stage 1 Remap (All Models): 520HP / 650Nm
- Hardware Required: None
Our Stage 1 remap unlocks substantial power gains with no hardware modifications required. The optimised ECU calibration enhances throttle response, ignition timing, and fuel delivery, making the C63 AMG even sharper and more responsive.
💡 Spark Plug Upgrade: Highly recommended for Stage 1 tuning to improve ignition reliability and performance under increased power loads.
Stage 2 – Power Gains:
- Stage 2 Remap (All Models): 550HP / 680Nm
- Hardware Required:
- Decat Downpipe or High-Flow Sports Catalyst
- Cat-Back Exhaust System (optional but highly recommended)
- Upgraded Air Intake System
- Larger Throttle Body (optional for additional performance gains)
- Performance Fuel Injectors (recommended for improved fueling at Stage 2)
- Spark Plug Upgrade (essential for optimal ignition and reliability at Stage 2)
Stage 2 tuning takes performance even further by incorporating essential hardware upgrades to enhance airflow, exhaust efficiency, and overall combustion, resulting in stronger power delivery and a more aggressive throttle response.
Looking for More Power?
For enthusiasts wanting even greater performance, we offer custom tuning solutions, including:
- Stage 3 upgrades with aftermarket camshafts, performance headers, and race-spec tuning
- Forced induction conversions (supercharger kits) for extreme power gains
📞 Call us on 01753 439321 to discuss your performance goals!
Why Choose Onyx Performance?
At Onyx Performance, we specialise in Mercedes-AMG C63 (W204) tuning and provide a range of services to ensure your C63 AMG runs at peak performance while maintaining reliability:
✔ 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
- Catalyst Fault Code Deletes
Our expert team ensures your Mercedes-AMG C63 (W204) delivers enhanced power, torque, and response, while keeping engine reliability a priority.
Exhaust Upgrades for Mercedes-AMG C63 (W204)
Enhance the sound and performance of your C63 AMG with a high-performance exhaust system:
🔧 Decat Downpipes – Improves exhaust flow and power delivery
🔧 High-Flow Sports Catalysts – Reduces backpressure while remaining emissions compliant
🔧 Cat-Back Exhaust Systems – Enhances exhaust tone and improves efficiency
🔧 Performance Headers – Maximises airflow for additional power gains
🔧 Resonator Deletes – Adds a deeper, more 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 Mercedes-AMG C63 (W204)
Keeping your Mercedes-AMG C63 (W204) 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 Mercedes-AMG models, you can trust Onyx Performance to maintain and enhance your vehicle with precision and care.
Styling, Performance Upgrades & Vehicle Security
Elevate your Mercedes-AMG C63 (W204) 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.
What Our Customers Say
⭐ “Stage 1 tuning completely transformed my C63! The throttle response and power gains are incredible. Thanks to Onyx Performance!”
– Tom W., London
⭐ “Stage 2 tuning with performance headers and a decat exhaust made my C63 sound and drive like an absolute monster. Amazing service!”
– Alex R., Birmingham
Opening Hours and Contact Information
📍 Visit Us:
Location: Slough, Berkshire
🕒 Opening Hours:
- Monday–Friday: 10 AM–6 PM
- Saturday: 10 AM–3 PM
- Closed Sundays
📞 Phone: 01753 439321
✉️ Email: info@onyxperformance.co.uk
Flexible Finance Options
💳 Spread the cost of your Mercedes-AMG C63 tuning, performance upgrades, and security solutions with our flexible finance plans, available over 4 monthly payments.
✅ All prices include VAT
✅ No hidden fees
✅ Simple application process
Tags:
- Mercedes-AMG C63 (W204) tuning in Slough
- AMG C63 Stage 1 remap (520HP / 650Nm)
- AMG C63 Stage 2 tuning with performance exhaust (550HP / 680Nm)
- Performance headers for Mercedes-AMG C63 (W204)
- Servicing and maintenance for AMG C63 (W204)
- Vehicle security for AMG C63 with immobilisers and trackers
- Custom aero and carbon fibre upgrades for AMG C63
🚗 Unlock the true potential of your AMG today! 🚗
