Stage 1, Stage 2, and Stage 3 Engine Performance Upgrades

Stage 1, Stage 2, and Stage 3 Engine Upgrades

Unlock the full performance potential of your vehicle with our Stage 1, Stage 2, and Stage 3 engine upgrade packages, carried out by expert technicians at our Langley, Slough performance workshop. Whether you drive a high-performance sports car, luxury saloon, or supercar, our upgrades are designed to deliver measurable power gains, sharper throttle response, and improved drivability without compromising reliability.

Stage 1 tuning is the perfect entry point, offering significant power and torque increases through precision ECU remapping while retaining all standard hardware. Stage 2 takes performance further with carefully selected hardware upgrades – such as high-flow downpipes, uprated intercoolers, and enhanced induction systems – to support higher boost levels and maximise efficiency. For those seeking ultimate performance, Stage 3 combines advanced ECU calibration with extensive engine, turbocharger, and exhaust modifications, delivering track-level power and acceleration for the most demanding driving enthusiasts.

Our tuning packages are tailored to your vehicle’s engine platform, driving style, and performance goals. We use only premium components, test each upgrade extensively, and ensure all modifications work seamlessly together to produce a balanced, reliable, and exhilarating driving experience both on the road and on the track.

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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 Stage 1, Stage 2, or Stage 3 Upgrade in Slough

From ECU remapping to full engine builds, we provide Stage 1, Stage 2, and Stage 3 upgrades for performance and luxury cars at our Langley, Slough workshop. Get in touch today to discuss your goals and create a custom performance package tailored to your vehicle.

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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 Stage 1, Stage 2, and Stage 3 tuning?

Stage 1 uses software tuning only, Stage 2 adds supporting hardware upgrades, and Stage 3 includes major engine and turbo modifications for maximum output.

Will my car still be reliable after tuning?

Yes – our upgrades are designed to operate within safe mechanical and thermal limits, ensuring your vehicle remains dependable.

Do I need to upgrade other components with Stage 2 or Stage 3?

Often, yes – upgraded brakes, cooling systems, and clutches are recommended to handle the extra performance safely.

Can I return my car to stock if needed?

Yes – we can revert your ECU to its original factory software at any time.

Which Stage is best for me?

It depends on your budget, driving habits, and performance goals – we provide tailored advice during your consultation.

Do you work with all makes and models?

We specialise in high-performance, luxury, and sports cars, including Audi RS, BMW M, AMG, Porsche, and more.

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