BMR's 2 degree camber bolts are used for adjusting camber on the OE and aftermarket struts. The 2005+ Mustang has no camber adjustment from the factory. When lowered 1" or more, the car begins to develop negative camber resulting in premature tire wear. It is possible to gain 2 degrees of camber with one pair of bolts. If you need additional camber adjustment, 2 pairs of bolts can be used and will allow 4 degrees total.