Hemi billet rocker stands are engineered and precision machined from 6061 billet aluminum with 100% accuracy. Rocker stands are anodized, and come complete with 4 oilier, 4 none oilier, 2 end pieces, 16 shaft springs, 20 grade 8 shaft mounting bolts, 20 washers, 16 arm shims. These rocker stands are designed for .875? stock size shafts, 7/16? stock size, ?? stock size dowel pins. Will fit all 426 Hemi engines.