Custom ECU Remaps for Economy, Power and Drivability Enhancement

Custom ECU Remaps for Economy

Unlock the full potential of your vehicle with our custom ECU remaps in Slough, designed to enhance fuel economy, power output, and overall drivability. Whether you drive a daily car, performance vehicle, or luxury car, our bespoke remaps are tailored to meet your driving needs safely and reliably.

Our expert ECU tuning service optimises your engine’s fuel delivery, ignition timing, and boost pressure to achieve the perfect balance between efficiency and performance. Drivers can expect improved throttle response, smoother power delivery, increased torque, and better fuel consumption — all without compromising engine reliability.

Serving Slough, Langley, Berkshire, and nationwide, we provide professional, fully tested ECU remaps, trusted by drivers who want maximum performance, cost savings, and enhanced driving comfort.

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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.

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Custom ECU Remaps in Slough for Power, Economy, and Drivability

Enhance your vehicle with our bespoke ECU remapping service, designed to improve power, torque, fuel efficiency, and overall drivability. Book your Slough-based custom ECU remap today and enjoy a smoother, more responsive, and efficient driving experience.

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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 is a custom ECU remap?

A custom ECU remap is a bespoke reprogramming of your car’s ECU to optimise power, fuel efficiency, and drivability according to your vehicle and driving style.

Will a remap improve fuel economy?

Yes — our remaps adjust engine parameters for better fuel efficiency while also enhancing power and torque.

Can custom remaps increase engine performance safely?

Absolutely — all remaps are engine-safe, fully tested, and tailored to your vehicle to ensure reliable performance gains.

How long does the remapping process take?

Typically, 1–2 hours for standard vehicles, while highly modified or performance cars may require longer dyno-based tuning.

Can a daily driver benefit from a custom remap?

Yes — our remaps improve throttle response, smoother acceleration, and fuel efficiency, making daily driving more enjoyable and economical.

Do you provide services outside Slough?

Yes — while based in Slough, our custom ECU remaps are available nationwide, with professional support for all types of vehicles.

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