Custom ECU Remapping and Engine Modifications in Slough

Custom ECU Remapping and Engine Modifications

For car owners in Slough looking to enhance engine performance, efficiency, and responsiveness, our garage specialises in custom ECU remapping and engine modifications. Every service is tailored to unlock your vehicle’s full potential, whether for daily driving, high-performance sports, or track use, ensuring improved power delivery, torque, and fuel efficiency.

We work on a wide range of vehicles, including performance cars, luxury models, and modified vehicles, offering bespoke ECU tuning, turbo enhancements, and intake/exhaust upgrades. Our team combines advanced diagnostic tools with expert knowledge to deliver precise, reliable, and safe engine modifications.

Residents across Slough and nearby areas trust us for professional, high-quality tuning solutions. From increased horsepower to smoother engine response, our services are designed to meet your exact requirements while maintaining engine longevity and drivability.

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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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Book Your Custom ECU Remap and Engine Upgrade in Slough

Transform your vehicle’s performance with custom ECU remapping and engine modifications at our Slough garage. We provide tailored tuning solutions, turbo upgrades, exhaust enhancements, and intake optimisation, all performed with precision and care. Trusted by local car enthusiasts, our services ensure enhanced power, better throttle response, and reliable engine performance. Book today to unlock your car’s full potential.

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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

Will remapping affect my vehicle warranty?

We use safe and tested tuning methods; warranty impact depends on your manufacturer policy.

Do you work on all car makes and models?

Yes – we tune a wide range of performance, luxury, and modified vehicles.

Can ECU remapping improve fuel efficiency?

Absolutely – besides performance gains, we can optimise maps for better fuel economy.

Do you offer turbo and exhaust modifications?

Yes – we supply and install high-quality turbo kits and exhaust systems for maximum performance.

How long does a remap or engine upgrade take?

Typically 1–2 days, depending on the complexity and type of modification.

Can I retain a standard map if needed?

Yes – we can backup your original ECU settings, allowing you to revert if required.

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