CB Engineering 2005 - 2010 Jeep Grand Cherokee WK and Commander XK rear control arm, track bar bushing sleeve replacements. 2002 - 2007 Jeep Liberty lower control arm sleeve. These are our 304 SS replacement bushing sleeves for our rear control arms and track bars. You can choose upper or lower control arm and track bar bushing sleeves. The upper and lower bushing sleeves are different.