Audi RS Performance Exhaust Upgrades, Decat & GPF Deletes

Audi RS Performance Exhaust Upgrades

Bring your Audi RS to life with our performance exhaust upgrades, decat downpipes, and GPF deletes in Slough. Designed for Audi RS models including RS3, RS4, RS5, RS6, RS7, and RS Q8, our services deliver maximum power, sharper throttle response, and an aggressive exhaust note worthy of the RS badge.

Whether you’re looking for the refined tone of a premium Milltek system, the raw roar of a Capristo, or a fully bespoke custom exhaust, our skilled technicians provide precision installation and performance-focused modifications. From full system upgrades to decat downpipes and GPF/OPF deletes, we ensure your RS sounds and performs at its absolute best.

Based in Slough, we’re trusted by Audi RS owners across Berkshire, London, and the UK for expert advice, flawless fitting, and performance gains that transform the driving experience.

Why Choose Onyx Performance?

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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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Upgrade Your Audi RS Exhaust System in Slough

Take your Audi RS to the next level with our performance exhaust upgrades, decat downpipe fitting, and GPF delete services. Whether you want a subtle enhancement in tone or a track-inspired system that unleashes maximum sound and performance, we provide tailored solutions and expert installation. Contact us today to book your Audi RS exhaust upgrade in Slough or nationwide.

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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

Do you offer exhaust upgrades for all Audi RS models?

Yes — we work on the RS3, RS4, RS5, RS6, RS7, RS Q8, and other high-performance RS models.

What benefits can I expect from a performance exhaust upgrade?

You’ll gain more power, reduced backpressure, improved throttle response, weight reduction, and a more aggressive exhaust tone.

What is a decat downpipe, and how does it improve performance?

A decat downpipe removes the restrictive catalytic converter, allowing for better exhaust flow, quicker turbo spool, and noticeable power gains.

What does a GPF/OPF delete do for my Audi RS?

Deleting the Gasoline Particulate Filter (GPF/OPF) restores your RS’s natural exhaust sound, improves flow, and enhances throttle response.

Are these modifications road legal in the UK?

Performance exhaust upgrades are usually road legal, but decat downpipes and GPF deletes are for off-road or track use only. We can also advise on MOT-compliant alternatives.

Can you fabricate a custom exhaust for my Audi RS?

Yes — we specialise in custom-built exhaust systems, allowing you to choose the design, materials, and sound profile that suit your RS perfectly.

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