
1) Vehicle modification
Found on
https://www.crosswordclues.com/clue/chip-tuning

Chip tuning refers to changing or modifying an erasable programmable read only memory chip in an automobile`s or other vehicle`s electronic control unit (ECU) to achieve superior performance, whether it be more power, cleaner emissions, or better Fuel efficiency. This makes use of the engine manufacturer to generally use a conservative electroni.....
Found on
http://en.wikipedia.org/wiki/Chip_tuning
No exact match found.