The Mustang SVO was a limited-production version of the Ford Mustang sold from 1984 to 1986, during which time it was the fastest, most expensive version of the Mustang available. Although it departed both physically and mechanically from any prior version of the Mustang, it held the same spot within the lineup, both in terms of performance over "lesser" variants and in prestige, as had variants such as the Shelby-tuned and "BOSS" Mustangs of the 1960s and 1970s.