These tubular arms can be used with stock coil springs and shocks, or with any after market coil spring and shock as well. The arms are made of 1.625 DOM and are MIG and TIG welded. These arms are superior than stock with Del-a-lum bushings for zero bind, and eliminate lateral twist threw the arm. The spring pocket is made of poly and allows you to install the spring easily and works as an insulator. The arms come fully assembled with ball joints and are powder coated black.