Launched in 1992, the Impreza quickly became Subaru's most iconic nameplate. Although it's an affordable compact at the core, the Impreza became famous for WRX versions and the rally-inspired WRX STi. But even though the STi is known as the most radical variant of the Impreza, being built with technology from rally racing, Subaru once offered an even more menacing variant. It's called the 22B STi and it was produced for only five months in 1998 to celebrate the company's 40th anniversary as well as its third consecutive title in the FIA World Rally Championship.