Available for only a year, the California Special was a factory built limited edition Mustang, and was an attempt to get some of the Shelby magic to rub off on the rest of the range. The package consisted of Shelby styling cues, such as the Marchal foglights, scoops, Thunderbird taillights, and the Shelby hood. Ford meant to build 5,000 examples, but demand for the California Special fell a bit short.
Ford did this sort of small-market limited edition a couple of other times. A nearly identical car to the GT/CS was marketed in the Denver area as the "High Country Special", and a few years later the "Twister Special" appeared in the Kansas area. All of these editions are pretty rare today, and are an interesting footnote to the Mustang story.