This is a pair of PowerStroke Front Shocks for Rock Crawlers. What makes these shocks so special? They include 14mm big bore aluminum shock bodies with infinite spring pre-load adjustment, strong machined aluminum shock caps, beefy 3.5mm shock shafts, and true dual-rate springs for a massive performance and durability upgrade over the stock shocks. For the 3S line of vehicles, all you need to do is fill the shocks with oil, install, and go! The 4S trucks require slightly longer shocks, so we recommend installing the included longer shock ends before use. This PowerStroke Shock is one of the most important upgrades available for your truck. Get your PowerStroke shocks today!