View the power and torque gains from our tuning files we developed for your Jaguar Xj 2003-x350 petrol 4.2 V8 supercharged 400HP.
The power and torque figures you see are just a generalized indication of the power gains that can be safely achieved through the use of our ECU tuning files. The actual results vary slightly, since no engine is the same as another one.
Our Blog section is full of examples of vehicles that we tuned for even more power than shown here without reducing the safety of the vehicle.
If you need further information, or you have more specific desires, feel free to contact us and see what we can do for you. And if you are a tuner and you wish to enjoy our unmatched quality and offer it to your customers, feel free to register on our tuners portal and upgrade the services you offer.