Also I will add that my dads November 2002 built BA XR6T that he bought brand new has adjustable top rear control arms from the factory, where as my old 2007 BF XR6T did not. In regards to my current F6, my cousins 2010 built F6 sedan that we just fitted Koni struts/shock as well as set of SSL springs to also has adjustable top rear control arms from the factory (he also bought this car brand new)