By changing some of these parameters, better performance is obtained. Sometimes you need to remove the speed (maximum speed) or remove the DPF / FAP filter or close the EGR valve. As I mentioned before, the chip is not changed, but modifications are made to the software from the motor computer, so it will be read through an OBDII diagnostic connector. Then that reading file is modified and the modified video is recorded in the motor computer. Depending on the model of the car does not always apply OBD tuning, in some cases the motor computer must be dismantled and the software read in another way. In any way to read whether OBD or disassemble the computer does not make any hardware changes on the computer itself. There is also a Tuning Box. It’s a part that is embedded and often mixed with Chip Tuning, and it’s about an electronic device that fuses a signal on one or more sensors.