For many years Sunbacker has had the honor to work with Kenworth Research and Development Laboratories. New designs and concepts would be produced at the R & D labs out of clay or HD foams. From these shapes, Sunbacker produced molds and the 1st operational parts. These 1st parts could be tested as to their performance. This latest photo was for the 52” sleeper unit and fairing fenders for the T680 now in production.