Here's a pic of one of the first, if not the very first Red Line flat track frame. It was made for the Factory Triumph Racer Don Castro. Also a little FYI history on Red Line. Every after market chassis company started pretty much the same way. Ray Hensley and Kenny Watkins started Sonic Weld. Ray branched off to start Trackmaster. Two guys that worked for Ray at Trackmaster decided that they were better than Ray, made way with some stuff on the way out the door. They started Red Line the next day. Funny they were almost identical to Trackmaster, Hmmmm? Don't worry, the same happened to them. An employee left Red Line to start Champion Racing Frames.