Performance Exhaust Upgrade

Performance Exhaust Upgrade – Transform Your Driving Experience with Onyx Performance

Performance Exhaust Upgrade

A performance exhaust upgrade is one of the best ways to enhance your car’s power, sound, and overall driving experience. At Onyx Performance, we specialise in supplying and professionally fitting high-quality performance exhaust systems from the industry’s top brands. Whether you’re seeking a deeper, sportier exhaust note, more horsepower, or a stylish upgrade to your car’s appearance, we’ve got you covered.

Why Upgrade to a Performance Exhaust System?

A performance exhaust system replaces your car’s restrictive factory exhaust with a design optimised for maximum airflow and efficiency. This upgrade offers a host of benefits:

– Increased Power and Torque: Improved exhaust flow reduces back pressure, allowing your engine to operate more efficiently and generate more power.

– Enhanced Exhaust Sound: Enjoy a more aggressive, sporty exhaust tone that reflects your car’s performance potential.

– Improved Fuel Efficiency: Optimising airflow can help your engine burn fuel more efficiently under normal driving conditions.

– Enhanced Style: With options like polished stainless steel or carbon fibre tips, performance exhaust systems add a premium look to your vehicle.

Why Choose Onyx Performance?

At Onyx Performance, we go beyond just supplying exhaust systems—we provide expert installation to ensure optimal performance and reliability. Our team of experienced technicians handles everything from initial consultation to final fitting, so you can enjoy your upgraded exhaust system with confidence.

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.

Top Performance Exhaust Brands at Onyx Performance

At Onyx Performance, we supply and fit exhaust systems from the world’s most trusted brands, ensuring unmatched quality and reliability. Our range includes:

– Akrapovič: Renowned for their lightweight titanium exhausts and unparalleled sound engineering, Akrapovič systems are a favourite among performance enthusiasts.

– Milltek Sport: Offering a wide range of exhausts for street and track, Milltek systems combine premium build quality with excellent performance gains.

– Scorpion Exhausts: Made in the UK, Scorpion delivers precision-engineered systems with a focus on power, sound, and durability.

– Remus: With a reputation for innovative designs and aggressive exhaust tones, Remus is a go-to choice for performance drivers.

– Armytrix: Known for their advanced valvetronic systems, Armytrix exhausts let you switch between subtle and aggressive tones at the touch of a button.

Common Models

Our range of performance exhaust systems is designed to enhance a variety of high-performance vehicles, including:

– BMW – M140i, M240i, M340i, 335d, M3, M4, M5, X5M, X6M
– Audi – S3, RS3, RS4, RS5, RS6, RS7, TT RS
– Mercedes-AMG – A45, C63, E63, GLC63
– Volkswagen – Golf GTI, Golf R, Polo GTI, Scirocco R
– Ford – Focus ST, Fiesta ST, Mustang 5.0

Whether you drive a sleek saloon or a powerful hot hatch, Onyx Performance has the perfect exhaust system to match your car.

Customer Reviews

    
 
 
       Posted on Google  
   
   Mark Wiltshire 
 
 
 
 Trustindex verifies that the original source of the review is Google. Professional yet friendly, very helpful would recommend 👍
  
 
      Posted on Google  
   
   Paul Forrester 
 
 
 
 Trustindex verifies that the original source of the review is Google. Nice refurbishment of my alloys
  
 
      Posted on Google  
   
   Noel Kerins 
 
 
 
 Trustindex verifies that the original source of the review is Google. Excellent service, great quality job on 2 of my black alloys. They also did my father & husbands cars too. Great value for money and a special thanks to Ben.
  
 
      Posted on Google  
   
   Jamie Taylor 
 
 
 
 Trustindex verifies that the original source of the review is Google. Had my golf R mapped and tuned to stage 2 very impressed with the work they done Ben and Sam great guys very friendly and very professional would recommend 👍🏻
  
 
      Posted on Google  
   
   DSK 
 
 
 
 Trustindex verifies that the original source of the review is Google. Brought my Audi S3 in for a Stage 3 tune with a bigger turbo and full supporting mods. Things didn’t start smoothly — the Falcon turbo I had fitted from eBay turned out to be faulty and smoked heavily on the dyno.Instead of rushing the job or giving me attitude, they helped me swap it out for a proper Garrett PowerMax and carried on professionally. Then I ran into fueling problems caused by another low‑quality eBay part, and again they took their time, diagnosed the issue properly, fixed it, and made sure everything was right before continuing.After all the setbacks, they still mapped the car, spent a lot of time on it, and didn’t charge me anywhere near what the work was worth.They showed patience, honesty, and real skill. Very happy with the service and the way they looked after me.
  
 
      Posted on Google  
   
   randip 
 
 
 
 Trustindex verifies that the original source of the review is Google. Highly recommended. Fitted my catless downpipe and full exhaust on my Audi RS7. The sound is amazing!

The staff were very friendly and kept me updated at every step of the process
  
 
      Posted on Google  
   
   Dan Simmonds 
 
 
 
 Trustindex verifies that the original source of the review is Google. This is the second time I have used Onyx Performance first time for wheel refurbishment and last time for remap and i would use their services again in the future without a doubt. They are very knowledgeable about what they specialise in, they are polite and you can see they care not only about what their customers want to do but also about what they can offer the customer. Thanks to the OP team.
  
 
      Posted on Google  
   
   Taranjit Lehal 
 
 
 
 Trustindex verifies that the original source of the review is Google. Took my Mercedes C200 to Onyx performance for a stage 1 remap, my car is much quicker and throttle response is much better than before the remap. They also advise you about power and gains and the maps are tailored for your specific car and model, no stress on engine or gearbox. Thank Onyx , Brilliant work.
  
 
      Posted on Google  
   
   Carlos fernandez 
 
 
 
 Trustindex verifies that the original source of the review is Google. Absolutely fantastic service friendly customer service will definitely be going back for further modifications 5 star service do not go anywhere else other than onyx😎🙏🏼
  
 
      Posted on Google  
   
   Aurimas Gercas 
 
 
 
 Trustindex verifies that the original source of the review is Google. Great service, recommend.

Ready to upgrade your car’s exhaust system?

Call Onyx Performance today to discuss your vehicle and performance goals. Our team will recommend the best exhaust system for your needs, provide a tailored quote, and schedule professional fitting at our state-of-the-art workshop.

5-Star Google Reviews

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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 a performance exhaust system?

A performance exhaust system is an upgraded version of your car’s factory exhaust, designed to improve airflow, increase power, and enhance the exhaust sound.

How much power can I gain from an exhaust upgrade?

Power gains depend on the system and your vehicle, but a performance exhaust can add significant horsepower and torque, especially when paired with other modifications.

Will a performance exhaust make my car louder?

Yes, most performance exhausts are designed to produce a sportier, more aggressive sound. However, some systems include adjustable valves to control the volume

Do I need a professional to install a performance exhaust?

Professional installation ensures proper fitment and performance. At Onyx Performance, our technicians are experts in fitting exhaust systems to a wide range of vehicles.

Which exhaust brand is best for my car?

We stock leading brands like Akrapovič, Milltek Sport, Scorpion, Remus, and Armytrix. Each brand offers unique benefits, and our team can help you choose the perfect system for your car.

Get a quick quote

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