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Stage 1, Stage 2, Stage 3 ECU Remapping and Performance Tuning

Stage 1, Stage 2, Stage 3 ECU Remapping and Performance Tuning

Stage 1, Stage 2, Stage 3 ECU Remapping

Take your vehicle’s performance to the next level with our Stage 1, Stage 2, and Stage 3 ECU remapping and performance tuning service in Slough. Designed for performance enthusiasts, modified cars, and high-powered vehicles, our bespoke tuning ensures maximum power, torque, and drivability at every stage of modification.

Stage 1 remaps optimise your stock vehicle for better power, throttle response, and fuel efficiency, without additional hardware. Stage 2 remaps cater to cars with mild performance upgrades such as intake, exhaust, or intercooler modifications, unlocking significant performance gains. Stage 3 remaps are for heavily modified engines, tuned to work with turbochargers, larger intercoolers, and high-performance exhausts, delivering extreme power and torque safely.

Serving Slough, Langley, Berkshire, and nationwide, our expert technicians provide fully tested and safe ECU remaps, ensuring your car achieves its full performance potential while maintaining reliability.

Why Choose Onyx Performance?

As Seen on Carwow

We’ve been proudly featured on Carwow – a testament to the quality, professionalism, and performance-focused results that set us apart. Watch our feature here to see us in action.

Expertise You Can Trust

With years of experience and deep technical knowledge, our team understands performance vehicles inside and out – from custom remaps to high-end servicing.

Advanced Workshop & Tools

We operate from a state-of-the-art facility in Slough, equipped with cutting-edge diagnostics, dyno testing, and industry-leading tools for accurate, high-quality work.

Tailored Solutions for Every Vehicle

We don’t believe in one-size-fits-all. Every car gets a bespoke approach, ensuring the best results whether it’s a remap, upgrade, or routine service.

Trusted Nationwide

Performance enthusiasts from across the UK come to Onyx because they know they’ll receive premium-quality workmanship, careful attention to detail, and honest advice.

Complete Care, All in One Place

From tuning and servicing to tyres, trackers, and immobilisers – we offer a full suite of services under one roof, all with a strong focus on safety, reliability, and top-tier customer support.

Stage 1, 2 & 3 ECU Remapping in Slough

Maximise your car’s potential with our Slough-based stage ECU tuning services. Whether you’re looking for modest improvements or extreme performance gains, we provide customised remaps for every stage. Book your performance ECU tuning today and experience powerful, smooth, and reliable performance.

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Why Choose Onyx Performance for Servicing?

Experts in Performance Cars

We know how to properly care for performance, modified, and luxury vehicles. Our team has the skills and experience to handle specialist requirements confidently.

Correct Service Schedules

Every service follows the exact schedule recommended by your vehicle’s manufacturer, helping maintain performance and protect your warranty.

Quality or OEM Parts

We only use high-quality aftermarket or original manufacturer parts, ensuring long-lasting reliability and top-level performance.

Full Vehicle Inspection

Our service goes beyond just changing oil. We inspect all key systems to keep your car safe, smooth, and road-ready.

Honest Advice, No Surprises

With transparent pricing and expert recommendations, you’ll always know what your car needs – no upselling, no hidden fees.

Fast, Trusted & Tracked

We offer quick turnaround, maintain service records, and send reminders – that’s why customers travel to us from across the UK.

Frequently Asked Questions

What are Stage 1, Stage 2, and Stage 3 remaps?
Stage 1 is for stock vehicles, Stage 2 is for lightly modified cars, and Stage 3 is for heavily modified engines, each offering progressively higher performance gains.
Can my car handle Stage 2 or Stage 3 tuning?
Yes — our technicians evaluate your modifications and engine condition to ensure safe and reliable tuning at each stage.
What improvements can I expect from each stage?

– Stage 1: Improved power, throttle response, and fuel efficiency.

– Stage 2: Significant performance gains with mild hardware upgrades.

– Stage 3: Maximum power and torque for heavily modified engines.

Is dyno testing required for these stages?
Stage 1 can usually be done via OBD remap, while Stage 2 and 3 tuning often requires dyno testing for precision and safety.
How long does each stage take to remap?

– Stage 1: ~1–2 hours

– Stage 2: ~2–3 hours

– Stage 3: ~3–4 hours (depending on vehicle and modifications)

Do you provide Stage remaps outside Slough?
Yes — we offer full stage ECU remapping nationwide, with expert guidance and support for all performance vehicles.

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