This snowmobile was a pre-production prototype. Had Arctic Enterprises actually produced any 1982 models, the El Tigre would have looked much like this sled. This unit was an engineering-model and not a photo-shoot model, thus it has a seat cover from a 1981 El Tigre on it. It is VIN numbered as a 1981 and looks to have began life as an 81 El Tigre. This has the common 500 liquid cylinders on the engine however it has a rare sandcast experimental bottom end on the engine that allows oil-injection. Oil injection had not been used on previous Cat liquids, nor was it used in the immediate years following either. The hood, windshield, nosecone, belly pan and console are all unique to the 1982 prototypes. Chassis VIN number: 1017733. Engine case number: ZTO370-12. I have not yet confirmed how many of these made it out to the public but am guessing it may have been as low as a few dozen? Odometer shows over 6400 miles on this sled. Is in running/riding condition. This sled was featured in an article in a fall 2009 issue of American Snowmobiler magazine.