Testimonials
Testimonials – Customers Who Travelled for Dyno Tuning
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.
Book Your Dyno Tuning Session in Slough Today
Join the growing list of customers who travel from across the UK to experience our trusted dyno tuning service. Whether you’re chasing more power, smoother drivability, or accurate performance data, our state-of-the-art rolling road and experienced technicians deliver results you can rely on.
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
Do customers really travel long distances for your dyno tuning?
Yes — many of our clients come from London, Birmingham, Manchester, and even further across the UK because of our reputation for precision and expertise.
Is it worth travelling to Slough for a dyno run?
Absolutely. Our advanced 2WD and 4WD dyno equipment, combined with experienced technicians, ensures you get accurate and safe results.
Can I book my dyno tuning session online before travelling?
Yes — we provide an instant online booking system so you can secure a time slot before making the journey.
Do you offer same-day dyno runs for travelling customers?
Where possible, yes. We recommend pre-booking online to guarantee availability.
What facilities do you have for customers waiting during dyno testing?
We provide a comfortable waiting area and customers are welcome to watch the dyno run safely from our viewing space.
Do you cater for car clubs or groups travelling together?
Yes — we frequently host dyno days for groups and car clubs, making it a great experience for enthusiasts who travel together.
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