This M-Chassis Aluminum damper set is a must upgrade for TAMIYA M03, M04, M05 and M06 chassis because it improves car handling drastically. I have built a set for my M05 and use the TAMIYA VG Damper oil 40 as per manual instructed. I test run the M05 with this damper set and the results the car can turn in corners very fast without worrying the car flip over / body roll. This damper set requires less maintenance because after 5 battery packs running, I remove the damper spring and the damper can perform full rebound! I recommend this damper over the super mini CVA damper because The CVA tends to leak damper oil easily and unable to perform full rebound after 3 battery packs running. TAMIYA did a very well job producing high performance damper for mini chassis. This damper is very worthy for its price per performance.