kohler magnum k&n air filter

[mark.aa]

i have a 1991 argo cat 8x8 magnum with a kohler 18hp magnum engine and wanted to see if k&n do a replacment air filter for it ,but the engine i.d sticker is faided and cannot see the engine code that k&n want on there site to find application .does anybody know what it is?cv18?