<strong>4. </strong>These are the lower control arm bushings. Older versions of the JD kit came with the bushings and sleeve on the left. The newer ones come with the bushings and sleeve on the right. The newer hardware features a thicker-walled sleeve and spiraling internal grease grooves that retain grease better than the older versions. If you’ve got an older JD long-travel kit you can upgrade simply by ordering the newer bushings and sleeve. The lower control arms include zerk fittings to facilitate quick-and-easy maintenance.