UMI's 2048 upper double shear bracket is designed for use with 1/2" bearing, racing style shocks. This bracket allows for the removal of the rust-prone upper mount unit and converts to racing style double shear. It is recommended for use with Viking shocks, and most other standard style racing shocks. Please contact us for assistance before making your purchase. This component is proudly made in Philipsburg, PA, USA and has been race-proven on our house Camaro.