Re: mito 155bhp
You can only buy the Esse Esse kit through Abarth garages and they can only be sold to an Abarth car, the Chassis numbers are logged and they also have to send a diag readout from the ECU to Turin before they can get the kit. Al sorts of nonsense about how much time on the rev limit etc are deciding factors as to whether they will supply the kit even to an Abarth car.
However there are rumours that Abarth will be expanding their range to include tuning kits for Alfa and Lancia in the future. The source was reasonably reliable but not details or time frames.