Our Services

Additional Services

We can also support the following modifications within our engine ECU remap software.

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ECU & TCU Tuning File Supply - The Remapping File Service


byteflash ecu tuning file service


We offer ECU tuning files through our trade brand ByteFLASH, allowing customers to value add their business by offering remapping to their customers.

What is ByteFLASH?

ByteFLASH is our trade tuning file services brand. By Utilising the ByteFLASH brand, customers are able to market themselves as ByteFLASH Installers, where ByteFLASH is a software product, enabling them to establish their own brand and reputation in their area. The ByteFLASH brand does not offer retail-based workshop tuning directly to customers, and only directs customers to their nearest ByteFLASH installer.

Why use ByteFLASH ECU Tuning files?

All ByteFLASH tuning files are written in house by JR Tuning UK. We are committed to providing some of the highest quality ECU tuning files available in the market today. We support a wide range of clients who wish offer Engine ECU or Gearbox TCU remapping services to their clients. Our dealers range from traditional car performance and modification centres, through to tyre shops, car sales dealerships and other tuning companies who choose to lean on our support and experience to grow their own business and offer the very best to their clients.

How does the ByteFLASH Tuning File service work?

1. Register for a ByteFLASH tuning files account at: http://www.byteflash.co.uk/portal

2. Login and purchase some ECU tuning file credits.

3. Fill out the easy submission form, including the original file read from the customers vehicle.

4. Once your modified tuning file is ready, we'll send you an email and text to confirm the file is ready to download.

5. Install the file on your customers car, and enjoy!


Already using another ECU tuning file supplier?

If you're moving from another ECU tuning file supplier and already have equipment you're comfortable using, more often than not we can migrate this equipment from your existing tuning company to the ByteFLASH tuning file service.

Already have master tuning equipment?

If you already have master equipment and simply require master tuning files, you can simply register for our trade tuning file service HERE.

WinOLS ecu file writing remapping file supply

What does ByteFLASH offer?

  • Master ECU tuning files
  • Slave ECU tuning files
  • Gearbox TCU tuning files
  • ECU Tuning Equipment: Kess, KTAG, X17, FLEX & more!
  • Full onsite technical training
  • Tricore & Bench tuning training
  • Comprehensive support via email and phone
  • EGR, DPF, Swirl Flaps & Speed Limiter Removals
  • Launch Control, Pops & Bangs & No Lift Shift
  • Custom Development from Stage 1 to 4

    Tuning File availability & turnaround

    The ByteFLASH ECU tuning file service is available between 08:00hrs and 18:00hrs GMT weekdays, 09:00hrs to 16:00hrs GMT on Saturday's and 10:00hrs to 14:00hrs GMT on Sunday's, however where customers pre-book jobs outside of these hours, we will do our best to ensure somebody is available to assist. During office hours we expect to return all remapped tuning files within 1 hour.