Audi RSQ8 Stage 1 & Stage 2 Tuning

Audi RSQ8 Stage 1 & Stage 2 Tuning – ECU Remapping Specialists at Our Slough Workshop

Audi RSQ8 Stage 1 & Stage 2 Tuning

Unlock the true potential of your Audi RSQ8 with our Stage 1 and Stage 2 ECU remapping and performance upgrades, carried out by expert technicians at our Langley, Slough workshop. The RSQ8’s 4.0-litre twin-turbo V8 delivers impressive stock performance, but with precise tuning, it transforms into a super-SUV capable of delivering breathtaking acceleration, sharper throttle response, and enhanced mid-range torque.

Our Stage 1 tuning safely optimises your RSQ8’s factory hardware for significant gains in power and drivability, while Stage 2 packages include performance upgrades such as high-flow downpipes, uprated intercoolers, and enhanced cooling systems. These modifications allow the engine to breathe more freely, maximise turbo efficiency, and deliver consistent power even under demanding conditions.

We also offer custom exhaust systems, including valved sports exhausts for an aggressive soundtrack with the flexibility to switch to a refined tone for everyday driving. With our ECU and TCU remapping, your RSQ8 benefits from quicker gear changes, improved responsiveness, and a truly engaging driving experience – all while maintaining 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 Audi RSQ8 Performance Upgrade in Slough

Experience supercar-level performance in your RSQ8 with our Stage 1 and Stage 2 tuning packages. From precision ECU remapping to hardware upgrades and custom exhaust systems, we deliver proven results at our Langley, Slough workshop. Book your consultation today and take your Audi to the next level.

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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

How much extra power will Stage 1 give my RSQ8?

Stage 1 typically delivers gains of +80–100 bhp and significantly more torque, making acceleration sharper across the rev range.

What’s included in Stage 2 tuning?

Stage 2 builds on Stage 1 by adding high-flow downpipes, performance intercoolers, and cooling upgrades, allowing for higher boost levels and sustained performance.

Will the tuning affect reliability?

Our software and hardware upgrades are developed to work within safe operating limits, ensuring long-term engine and gearbox health.

Can you also tune the gearbox (TCU)?

Yes – TCU tuning provides faster gear changes, improved shift logic, and optimised torque delivery for a more dynamic feel.

Do you offer exhaust upgrades for the RSQ8?

Absolutely – we supply and fit valved performance exhausts for a deeper, sportier sound with switchable modes.

Is your tuning suitable for both daily driving and spirited use?

Yes – our calibrations strike the perfect balance between everyday comfort and maximum performance when you want it.

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