Abarth has made a lot out of very little. Its entire lineup is based on the 500 and (in markets other than ours) the Punto. But that isn't about to change anytime soon.
Fiat 500l Abarth
As far as product portfolios go, Abarth is about as small as they come. The performance arm of Fiat, Abarth bases its entire line on two models: the 500 and the Punto. And even within that, only the 500 is offered Stateside. But that could change.