SPC Camber Bolts are Much Better than OEM FRS or BRZ
FRS/BRZ Camber Bols are not positive in that they have a reduced Diameter and are held in position by Manually pushing the "HUB to where You think it should be and then tightening the Nut, whilst praying that it doesn't move!!
The SPC Camber Bolt has a Cam to adjust it's position, then Torque the Nut to Spec..
Altho Not USA Made (China) it's still a better design and appears well machined/finished.