MST MRX S PRO KITMST (#532208) MRX S PRO RWD Drift Car KIT Package Content: Assembly chassis kit Design and implement the Quick Change Differential system concept from the real FD D1 drift racing to the RC vehicle. Simply follow the instructions in the manual for assembly and setup, and you'll have a stable and agile driving experience with a powerful chase sensation. The MRX S also includes the Quick change differential system with 19T 21T "steel gears" and a