what is sti stand for
STI stands for âSubaru Tecnica Internationalâ. Itâs basically a better Subaru WRX with performance-tuned engines, transmissions, and suspensions. STI is the division of Fuji Heavy Industryâs that specializes in motorsports. This is the team that worked with Prodrive to develop the first Impreza WRX in the early 1990s.