M-06 Chassis: Use with 50746 or 54000. GF-01 Chassis / G6-01 Chassis: Use with oil dampers (54670, etc.) WR-02CB Chassis / GF-01CB Chassis: Use on rear arms. Use with 50808 and kit D4 or 54610. GF-02 Chassis: Use on rear arms. Use with dampers such as 54670.