"A HISTORY OF FIRSTS. All automobile manufacturers build vehicles. But we create entirely new automotive categories. Chrysler invented the Muscle Car. The 1955 Chrysler C-300 model was America's first "Muscle Car." Chrysler also invented the SUV and minivan. Working with Orville Wright,(1) we pioneered wind tunnel development and ushered in the era of modern automotive aerodynamic design. When we developed the HEMI® engine in the 1950s, the technology proved so powerful that NASCAR banned it in 1965. We also were the first to put a modern radio in an automobile. And you know how you start your car? Chrysler invented the Key-Start Ignition System."
http://www.chryslerllc.com/aboutus/
From their website. They aren't claiming they contributed to creating what we commonly refer to as muscle cars or claiming they helped inspire an iconic era, they flat out say they "INVENTED" the muscle car.
I'm calling BS on this one. The C-300, 409, Max Wedge, Old 88, etc are all truly incedible cars and probably, probably did pave the way for what we now call muscle cars, but to claim that distiction solely for themselves is untruthful IMHO.