The diesel all others fall in line behind. A ship that’s the standard-bearer for tradition and ongoing excellence. Winnebago’s is the 2005 Vectra. You’ll find that excellence in the Evolution™ Chassis, a Winnebago Industries exclusive. Our engineers worked closely with Freightliner to create a chassis with one-piece formed steel chassis rails, which provide increased mid-section storage, better weight distribution, and improved floorplan flexibility.