1990 ARCTIC CAT SNOWMOBILES performance modification manual 182 pages Arctic Cat ~ Cheetah , Cougar, Cross Country Cat, EI Tigre, EXT,Prowler Jag , King Kat , Kitty Cat , Lynx , Pantera, Panther ,Puma, Trail Cat VIP, Wildcat, and Z Lots of performance info and specs formthe early 70s to 1990 models