I've never seen one of those before. Did some research and evidently they had some history in rallycross as well as being Motor Trend's car of the year in 1980. After some issues started popping up, Chevy fixed everything in 1985 and renamed it the Citation II with the X-11 being the performance package (130hp/150tq, stabilizer bars, suspension, etc.). Obviously nothing to write home about by today's standards but they have some cool history I guess.