These are SWORKz factory replacement rear CVA axles for the S12-3 2WD buggy platform. Each axle features a combined plastic cup and metal shaft construction designed for constant-velocity articulation at the rear wheels. Sold as a set of two, covering both rear positions. Features: Set of 2 rear CVA axles Combined plastic cup and metal shaft construction CVA design for smooth rear wheel articulation Direct replacement for S12-3 2WD buggy 7/7/26 cs