It's not available yet, but probably will be soon. I hate to be a stickler for accuracy, but the post actually says "After we will receive all data from this car we will approve the Multiair Tuning" It does not say it is now being offered in the US.Pogea is now offering their Stage1 tune in the US. The lokal partner is the 124spider specialist AutoRicambi. Stage1 is just the first step.
Those are some crazy figures! >Not the 124spider but it shows what is possible with a small 1.4l FCA Engine.
The performance curve doesn't look that it is a daily driver
(picture from Pogea-FB page)