It'll be the DDCT box from the GP/Mito. I don't think DDCT will ever make it onto standard 500's though as in the 1.2, 1.3, 1.4 and SGE engined ones. Abarth should get it as an option any day now.
Price? Lots. 6k more than the standard car is so far off it's not funny. I'd say mid 20's at LEAST if it ever gets to the UK which it won't because it'll be LHD only.
6k more for
DDCT
Special wheels
Carbon fibre seats
Ferrari interior
Ferrari paint
Brembo's
Leather
Esseesse kit + 20 horsies
aint gonna happen.,