Recently became aware of the possibility of getting more power and torque from my 9000 ECO by having the ECU changed or chipped. Several chippers claim to be able to do it and offer power increases of between 25 & 40 bhp with, they say, no downsides other than increased fuel consumption if the car is driven harder as a result. Seems a bit too good to be true. Anyone tried it? Is it really as straightforward as they say?