Little is known about the 1985 Oldsmobile FE3-X Calais Concept. The front end resembles the 1985 Oldsmobile FE3-X Firenza Concept (1985). However, the rear doesn't slope like the other concept. Instead, the Calais' rear abruptly stops and leads to a squared-off tail Comment below if anything is known.
Images: oldconceptcars