Connecting Kit Car (and Replica) Enthusiasts Worldwide | KitCarConnection.com

It really got it’s start in the 1950’s when “cool” was becoming a household word but she has been around since the 1930’s.  Way back then, car manufacturers started a process wherein some of the steel between the bottom and the top of the window was removed from the car to lower the roof height. It made the street rods look better because the original roof line was just too high above the rest of the car's body.