Today's muscle cars are something else, from Hellcat engines to Boss 9's, and the ever popular LS swap, there's a lot of muscle under the hoods of custom and production vehicles. But these cars didn't just show up with all that horsepower, no, there's a long lineage of American muscle cars, and Stacey takes you on a tour of a new an old muscle. There's something to be said about the drive of the American auto industry and how our country built the muscle car legacy.