But in order to have the team running the Dyno "tune" the car or dial the A/F in, a tuner will be necessary. If it is a module like the Jet, then it cannot be modified. If it is a Predator or SCT then you will have to own one since it mates with the car and only that car. In order to use it again on a different car, the stock tune needs to be reloaded on the car and the system unlocked.