Hello is it really worth it to purchase this item? Are they really works? So after install and tune all the changes . Put that device away . ? What about the little black box come with wires. ? Thanks
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Sir, the wires and the box are part of the kit it needs to be installed if you go to taller tires or change your gear ratio if you do not use this calibrator your transmission will not shift correctly. this device needs to be installed on the vehicle in order to work. Thanks for your question.
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