BMW M140i B58 Dyno Tuning & Remapping – Stage 1 & Stage 2 | Onyx Performance
Are you looking to unlock the full potential of your BMW M140i B58 with professional dyno tuning? At Onyx Performance, based in Slough, Berkshire, we offer high-quality Stage 1 and Stage 2 remaps, tailored to deliver maximum power, torque, and drivability while maintaining reliability.
What is Dyno Tuning & How Does it Benefit the BMW M140i B58?
Dyno tuning, also known as rolling road tuning, is a process where your BMW M140i B58 is placed on our state-of-the-art 4WD dyno and fine-tuned for optimal performance. By adjusting engine parameters, we can improve:
✔ Horsepower & Torque Gains – Increased power output for faster acceleration & stronger mid-range pull
✔ Fuel Efficiency – Improved engine efficiency and fuel consumption
✔ Throttle Response & Driveability – Sharper throttle inputs and smoother power delivery
✔ Turbo Boost Optimisation – More efficient turbo control for better low-end response
At Onyx Performance, we develop and test all our remaps in-house on our dyno, ensuring safe, reliable, and dyno-proven results for your BMW M140i B58.
BMW M140i B58 – Stage 1 & Stage 2 Tuning Power Gains
Stage 1 Remap – Performance Upgrade on Stock Hardware
✔ Stock Power: 340HP / 500Nm
✔ Stage 1 Remap: 410-420HP / 600Nm
✔ Hardware Required: None
Our Stage 1 remap provides a substantial power increase, refining boost control, throttle mapping, and fuel delivery, resulting in a more responsive, powerful, and efficient driving experience.
Stage 2 Remap – Maximum Performance with Supporting Mods
✔ Stock Power: 340HP / 500Nm
✔ Stage 2 Remap: 420-450HP / 620-650Nm
✔ Hardware Required:
- Decat Downpipe or High-Flow Sports Catalyst
- Upgraded Air Intake System
- Larger Intercooler
- Onyx Performance Stage 2 Gearbox Software
Stage 2 tuning builds on Stage 1 by incorporating essential hardware upgrades to enhance airflow, cooling, and turbo efficiency, allowing for greater power, sharper throttle response, and improved turbo longevity.
Looking for even more power? We offer custom Stage 3 hybrid turbo packages for extreme performance builds.
Onyx Performance – BMW M140i B58 Remap Service Includes:
✔ Rolling Road (Dyno) Session – Dyno-tested tuning for accurate performance figures
✔ Before & After Power Printouts – Compare stock vs tuned performance
✔ Engine Smoke Test – Identifies boost & vacuum leaks before tuning
✔ Sports Displays Recalibrated – Matches higher power outputs
✔ Catalyst Efficiency Fault Code Delete (Optional)
✔ Sport Mode Overrun Crackles (Optional)
✔ Speed Limiter Removal – Unlocks top speed restrictions
✔ Cold Start Delete (Optional) – Reduces loud startup noise for GPF-equipped models
✔ Diagnostic Health Check – Ensures your car is running perfectly before and after tuning
Servicing & Maintenance for BMW M140i B58
To maintain peak performance and longevity, regular servicing is essential. At Onyx Performance, we offer:
? Routine Servicing – Oil & filter changes, essential maintenance
? Brake Upgrades – OEM replacement & high-performance braking solutions
? Turbo & Cooling System Inspections – Ensuring optimal boost & cooling efficiency
? Suspension & Handling Checks – For enhanced ride quality & stability
? Diagnostics & Fault Code Reading – Detects potential engine & gearbox issues
We also provide digital service history updates for all BMW models, keeping your records up to date.
Vehicle Security – Protect Your BMW M140i B58 from Theft
High-performance BMWs are frequent targets for theft. At Onyx Performance, we provide advanced security solutions, including:
? Autowatch Ghost Immobilisers – Prevents key cloning & theft
? MetaTrak GPS Trackers – Live tracking via mobile app
? Scorpion Track Systems – Driver recognition & motion alerts
? Fleet Tracking Solutions – Ideal for owners with multiple high-value vehicles
All security systems are professionally installed for maximum protection.
Why Choose Onyx Performance for BMW M140i B58 Tuning?
✔ BMW Performance Tuning Specialists – Years of experience optimising B58 engines
✔ Dyno-Proven Results – All tuning tested in-house for accuracy & reliability
✔ Safe & Reliable Tuning – Our remaps maintain engine & transmission longevity
✔ Comprehensive Performance Solutions – From Stage 1 tuning to full custom builds
✔ Flexible Finance Options – Spread the cost of your tuning and upgrades
Book Your BMW M140i B58 Remap or Servicing Today!
? Onyx Performance – Slough, Berkshire – The UK’s leading BMW tuning specialists. Whether you’re looking for Stage 1 or Stage 2 tuning, exhaust upgrades, servicing, or vehicle security, we have the expertise to transform your BMW M140i B58.
? Contact us today to book your tuning service!
? Unlock the full potential of your BMW M140i B58 with Onyx Performance! ?