This is the most important upgrade for M05 chassis. The heat sink plate is large enough to dissipate heat from motor effectively in the long run. Therefore the cooler the motor, the longer the run time (fun time). The plate also looks cool on the chassis.
if you plan to uprade the motor, this is a must replace part for it, the plate will hold the notor better so you won't lose power, and it also act as a heatsink, don't use the orginal plate as it can't handle a high end motor. you also able to add 2 copper heatsink on the top of the car connect to this plate, look sexy.