~Adjustable rear upper arms (rearward position) ~The 2nd Generation Lexus IS uses two separate forward and rearward upper control arms to form a virtual A-arm. Because of this design, we recommend to always install both sets of rear upper arms together to allow for camber adjustment. Forward upper arms (part # XE20RUCA1) sold separately ~Maintenance free spherical bearings and replaceable chromoly ball joint tapers. Sold in Pairs. Fits 2nd Gen Lexus IS250 350 & F 06-13 XE20 GSE20 as well as 05-11 Lexus GS300/350/430/450h/460 3rd Gen GS S190 S191.