This is a pair of PowerStroke Rear Shocks for ARRMA® 3S vehicles. Pro-Line is ready to unleash high-performance PowerStroke Shocks that have been specifically designed for your ARRMA® 3S vehicles! 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 them, and go! This Powerstroke Shock is one of the most important upgrades available for your truck or buggy. Get your PowerStroke shocks today!