Uniball Upper Control Arms are designed for severe duty use with stock and most aftermarket suspension systems. Fabtech Uniball Upper Control Arms directly replace the factory upper control arms for use on stock, aftermarket or Fabtech'suspensions providing additional strength and reliability to the vehicle. Replaces upper ball joints with 1in FK Stainless PTFE Uniballs. Heavy duty upgrade for stock and aftermarket suspensions. No modification to spindle required for installation. Includes Arms, Uniballs, Pins Misalignments. .120in Wall 4130 Chromoly. 1.25in OD