The Esseesse (Italian for SS) is an aftermarket kit available directly from Abarth that turns the Fiat 500 up to 11. While the European Abarth comes standard with 135 HP, the SS provides an upgraded ECU which boosts power to 160 HP. The kit also includes upgraded suspension, brakes, and wheels. Here’s the description from the Abarth website:
Absolutely everything is ramped up: the peak torque reaches a dizzying 230Nm at 3000rpm, the power output is 160bhp and top speeds can reach 211km/h. Goodies include perforated front and rear disc brakes, a special air filter powered by BMC, four tyre pressure sensors, high-performing tyres and 17” alloy wheels in white or titanium.
Be sure to check out the Abarth website for more technical data to drool over (or download the PDF directly). Will there be a similar upgrade kit for the Fiat 500 Abarth US version? In an ideal world, I could order the kit through an official Fiat/Chrysler dealership and have it installed by an Abarth approved mechanic on site. Ah to dream.