aFe 460-401003-A aFe Control PFADT Series Spherical Control Arm Bearings; SolidaFe 460 401003 A aFe Control PFADT Series Spherical Control Arm Bearings; Solid aFe Control is proud to release the PFADT Series, Solid Spherical Control Arm Bearing Set for the 06 13 Corvette C6 Z06. OE factory bushings are known to deflect more than a 1 4" inch in turns which equates to almost 1 degree of lost camber and unpredictable handling. Serious racers finally have an engineered solution for solid spherical control arm bearings. The