Some MOPAR purists insist that the Chrylser 300 Series or "Letter Cars" were the first muscle cars. That is debatable as the 300 Series were fast, large, luxury coupes instead of cheap all out intermediate size performance.

 

However, there is no denying that the elegant Chrysler 300 Series made performance cool again and started the horsepower race among American automobile manufacturers. For that, all muscle car fans must be thankful.