The sole surviving streamliner of the Katy sits stuffed and mounted in the afternoon sunshine at the railroad museum in Denison. Built in 1947, this unit started life as F3A #203C and was later renumbered into #66C. A wreck in June of 1974 would put the unit out of service, but the money-strapped railroad would rebuild the unit into a cabless booster at their Parsons, Kansas shops. It was outshopped as 399B and was finally renumbered 401B, which it kept until retirement in 1988 following the merger with Union Pacific.