Everyone answers this question independently, it makes no sense to advise here and we will not do it, we will just tell you what you need to chip the engine.
So, in order to perform the operation, you will need:
Firmware - here it is very important to choose a high-quality version, otherwise, the consequences will be most pitiable;
Microcircuit - the choice is quite large and depends on the desires of the car owner, as well as the brand of his car;
Circuit board - similar to the firmware. You should not chase a cheap copy, it is better to take once, but a quality product. I recommend to take from
ecutools .
Carrying out the operation of chipping yourself, it is also worth remembering that you can perform it only on a functioning engine, passed the adjustment and calibration.