Tune-Files is leading in the development of Jaguar XJ tuning files. The development of each Jaguar XJ tuning file is the result of perfection and dedication by Tune-Files programmers. The organization only uses the latest technologies and has many years experience in ECU remapping software. Many (chiptuning) organizations around the globe download their tuning files for Jaguar XJ at Tune-Files for the best possible result. All Jaguar XJ tuning files deliver the best possible performance and results within the safety margins.
- 100% custom made tuning file guarantee;
- Tested and developed via a 4x4 Dynometer;
- Best possible performance and results, within the safety margins;
- Reduced fuel consumption.