Lower Swing Arm Ball Joint fits ATV models with YFM660 designation including 660 from model years 2002 through 2008 in various configurations such as F, FG, FGH, FH, FLE, and FHW.Compatible with 4x4 variants and designed to meet specifications for part number 5KM-23579-00-00.Also fits LX 500 and CF500, CF600 models.Suitable for use on UTV and buggy quad bike applications.This joint is intended for rear suspension system integration and provides articulation support for the swing arm assembly.