The SS Express is a Spoilers-esque version of the '70 Chevelle SS. This casting features a similar base with the rest of the preceding Chevelles, although the rear wheel tract is wider and the casting has a more detailed grille. Tabs for the bent axles for NCRL wheels are present when drilling this casting apart; these were never utilized.
Since 2011 the casting has gone under the name of Chevelle SS Express. The casting was retooled in 2022 for use in the mainline, gaining a plastic base along with other detail changes.