Fiat uncorks the top-speed limiter on the Topolino so it can qualify under federal low-speed vehicle laws. On the road, the car can now reach the dizzying top speed of 25 mph. The kit, Fiat told Road & Track, also includes a box of new parts. Fiat Topolino FiatNot only is the kit free as part of the $14,985 Topolino's MSRP, even though you didn't get it with purchase, Fiat will pay for the installation. Fiat told Road & Track that the automaker is paying dealers for the labor costs.