SPC Performance GM Rear Camber Adjustment Kit (pr)Use this pair (2) of cam bolts to double the adjustment range for rear camber and toe on GM's Epsilon platform. The OE cams only give one degree of change, this is often not enough camber and you may quickly run out of toe. The innovative design doubleschange to 2. 0 and can be used as both camber and toe adjusters, as needed. Depending on how much change is required, you may need to use SPC's 85130 rotary file to elongate the adjustment slot to take