The Ferrari F355 Serie Fiorano is the 1999 run-out special that sent the F355 off before the 360 Modena arrived. It is a Spider fitted with a Competizione-derived 'Fiorano' handling pack: a wider track, stiffer springs and a thicker anti-roll bar, plus drilled and ventilated brake discs with competition pads. Inside, carbon-fiber inserts trim the console and sills, and US cars carried a numbered dashboard plaque.

It was a small series, 104 built, with 100 planned for the United States (74 F1, 26 manual) and a handful for other markets. Mechanically it keeps the standard 375 hp V8; the Fiorano pack is a chassis and trim upgrade, not an engine one, aimed at sharper handling for the final F355s.