Gonzague, e-manage system just like your upgraded your standard ecu and also it;s only a piggy back. However, if your combustion system and O2 system are not good, even with emanage also will damage your 2's. May be currently it'll good but not guarantee can't last long.
Another thing, u need to know well the previous owner. Is the car in good condition?
Another thing, u need to know well the previous owner. Is the car in good condition?