Wiseco 16 x 20 x 22.5mm Top End BearingAs the leading manufacturer of forged two stroke pistons, Wiseco knows top end bearings are crucial to your top end rebuild. Wiseco two stroke top end bearings are manufactured by leading bearing suppliers and inspected for quality. This Part Fits: Year Make Model Submodel 1972 1975 Arctic Cat Cheetah 440 Base 1971 Arctic Cat EXT 440 Base 1974 Arctic Cat Lynx II 440 Base 1975 Arctic Cat Pantera 440 Base 1971 1975 Arctic Cat Panther 440 Base 1971 1973