Aluminum Oil Shock Set, 4pcsThe MXW003R are ultra precise oil filled shocks that replace the stock shocks. The small scale of the Mini Z 4x4s means that an effective and consistent shock needs to have much higher precision than a larger scale vehicle. These shocks come complete in a set of four, and the shock bodies and pistons are made to an exacting standard so the performance improvement is noticeable and very consistent.