About Us

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We have a state of the art 1500hp 4WD dyno with full engine analysis capabilities to ensure our developments are providing you with the best power gains on the market whilst maintaining optimum reliability for your engine via our live ECU Remapping service.

We offer performance modifications including Performance Exhaust systems, Hybrid Turbo upgrades, Intercooler upgrades, Induction kits, Uprated Clutch kits, Performance Brake kits, Suspension, Bushes, HID Light kits and the list goes on, being innovators of performance tuning we work with the top aftermarket part suppliers.  

We offer Alloy Refurbishment to the highest standards including Diamond Cut alloys with our state of the art CNC Lathe.  We offer a 72 hour service for Diamond Cutting, standard finish and for a custom finish, subject to the condition of your wheels. 

Onyx Performance is not just a performance house but we also offer Engine and Gearbox Servicing, Engine Carbon Cleaning, Boost Leak Smoke Test, Immobilisers & Trackers,  Mileage Blockers, BMW Module Coding, Window Tinting & Chameleon Windscreen Tinting.

We have a vast amount of experience with the often miss understood emission systems on modern diesel vehicles and can offer a wide range of services depending on the customers’ requirements. We offer a professional cost effective solution to fix any EGR, DPF or Adblue issue in Slough & West London.

We supply 2D, 3D & 4D Number Plates in Slough at Onyx Performance. Number plates can be collected from our Office in Slough.