Frank L. Di Gioia
True Classic
This is the gold standard if you're looking to improve your Fiat 500 Abarth. Magneti Marelli modules are "RACE ONLY" and should not be used on the street.....New they go for over $1200. Install in about an hour with complete video instructions on the "Fiat Madness" site. Complete with the normally missing remote control! Three settings: stock, #2 for greatly improved mid range and #3 for all out performance. With #3 better than 91 octane crap gas is suggested to get the most from the upgrade. Safe as all over rev and limit controls are still there. It's from my 2015 model year but should fit others, YOU DETERMINE THAT. 
There are various private concerns who will program your car from their mothers basement for less but I'll stick with the people who do Ferrari F1 tunes. Listed on Ebay for an equal shot for any/everybody.
https://www.ebay.com/itm/183933447646?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649
There are various private concerns who will program your car from their mothers basement for less but I'll stick with the people who do Ferrari F1 tunes. Listed on Ebay for an equal shot for any/everybody.https://www.ebay.com/itm/183933447646?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649