Onyx Performance

We are an ECU Remapping Specialist and Tuning house based in Berkshire offering a National 4WD Dyno Tuning Service at our Slough workshop. Our services include a wide variety from Performance tuning to dyno runs, engine & gearbox servicing, window tinting and engine carbon cleaning. Using some of the most advanced and sophisticated equipment available, combined with years of experience we are able to tune the vast majority of vehicles on the road today. We offer engine modifications including turbo, intercooler, exhaust, induction and suspension upgrades being innovators of performance tuning we work with the top aftermarket part suppliers. We have tuned and remapped Ferrari's, Lamborghini's, Mercedes AMG, Maserati's, Porsche's, Audi's, BMW's. Rolling Road dyno runs in West London and Berkshire including Slough, Stokes Poges, Farnham Royal, Denham, Maidenhead, Windsor, Ascot, London, Marlow, Bracknell, Staines, Reading, Heathrow, Hayes, Southall, Feltham, Hounslow, High Wycombe and Uxb