25. 1966 Ford Mustang GT HiPo
Most of the market was fascinated when they first saw the Mustang in 1964. Its compact, sporty looks and the very affordable price seemed unreal. The engine lineup consisted of two six-cylinder and 298 V8 with several power outputs. However, the most interesting was the K-Code GT (via Old Cars Weekly).

The K-Code and its 289 V8 had 271 hp, which was more than enough for a decent performance Mustang fans asked for. With an optional GT package that included a stiffer suspension and better equipment, 289 HiPo (High Power) was the choice of real car guys. Introduced in 1965 and available until 1967, 289 HiPo was the first Mustang that ran as well as it looked. This was especially true if you ordered it in gorgeous Fastback body style.