MR-04 Evo2 SP Chassis 8500KVKYO 32890B Kyosho Chassis Kit MINI Z Racer MR 04EVO2 Chassis Set (W MM 8500KV) While retaining elements of the excellent MR 03 layout, the new MR 04EVO2 chassis achieves significant performance improvements with changes to the front suspension and a lower C of G that work in synergy with a sensored brushless motor. Both narrow and wide tread settings are available by changing the lower and upper plates on the front as well as the steering tie rod.