Whiteline KTA287 for the BMW M2, M3 and M4 Series is a set of 4 complete arms to solve any front end issues you may have. Due to the high performance of many BMW models, the original rubber tension strut arm bushings tend to take a beating and have a limited service life. In addition many owners will lower their BMW with a lowering kit or coilovers and may have a front end geometry issue that needs correcting. For ease of fitment these new alloy tension arms also come complete with sealed ball joint ends and adjustable synthetic elastomer bushings. These facilitate +/- 0.5 deg caster adjustment for improved straight-line stability, enhanced steering feel, and stronger front-end grip on corner entry. The front control arms feature sealed inner bearings to provide superior precision, durability, and reduced deflection under load. High strength ball joints are included with the arms to make this a fit and forget purchase compared to the short service life of the cheaper aftermarket alternatives.