Engine Tuning & Performance Upgrades

Engine Tuning & Performance Upgrades – Increase Power & Efficiency

Engine Tuning & Performance Upgrades

Unlock your vehicle’s true potential with professional engine tuning and performance upgrades from Onyx Performance in Slough. Whether you drive a high-performance sports car, a powerful diesel, or a daily driver you want to enhance, our expert technicians can optimise your engine for more power, improved throttle response, and greater efficiency.

We use advanced dyno equipment and precision ECU calibration to ensure every adjustment is safe, reliable, and perfectly matched to your driving needs. From custom remapping to performance exhausts, induction kits, and turbo upgrades, we only fit high-quality components that deliver proven results.

Performance enthusiasts across Slough and the surrounding areas trust Onyx Performance for our attention to detail, bespoke solutions, and deep technical expertise. Every upgrade is tested and fine-tuned to give you maximum enjoyment behind the wheel – without compromising on safety or reliability.

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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 Engine Tuning in Slough Today

Experience sharper performance and improved efficiency with expert engine tuning from Onyx Performance in Slough. From custom remaps to hardware upgrades – book your tuning session now.

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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 the difference between ECU remapping and engine tuning?

ECU remapping involves reprogramming the car’s software to adjust performance settings, while engine tuning can also include physical upgrades like turbochargers, intercoolers, or exhaust systems.

Will engine tuning damage my vehicle?

When carried out by professionals like Onyx Performance, tuning is safe and designed to work within the limits of your engine and drivetrain.

Can you tune both petrol and diesel engines?

Yes – we offer tailored tuning solutions for both petrol and diesel engines, including cars, vans, and performance models.

Do you offer dyno testing?

Absolutely – our state-of-the-art dyno allows us to measure your vehicle’s power output before and after tuning for accurate results.

Will tuning affect my fuel economy?

In many cases, tuning can improve fuel efficiency by optimising the engine’s power delivery, especially in diesel vehicles.

Can I revert my car to its original settings?

Yes – we can return your ECU to factory settings if needed, restoring your vehicle to its standard performance.

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