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100% custom made tuning file guarantee

Tested and developed on a 4x4 Dynamometer

Best results within the safety margins

A decrease in fuel consumption

Tuning files Jac is leading in the development of Jac tuning files. All Jac tuning files are custom made and thoroughly tested on a 4x4 state of the art Dynometer. The development of each Jac tuning file is the result of perfection and dedication by 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 Jac at for the best possible result. All Jac tuning files deliver the best possible performance and results within the safety margins.

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