This is a great motor for you to change if your car kit contains the 540 stock tamiya motor. One of the most importants things to buy this motor is that you wont need to buy an extra Electronic Speed Control (ESC) since it works perfectly with your stock tamiya one. Your stock motor 540 J has torque around 250cm/sec and this RS-540 tuned motor comes with 350cm/sec torque so from this you can understand that is much more powerfull than you old one. Be carefull cause this motor contains brushes, its not brushless and thats why it comes with two wires( brushless motors comes with three wires and definately need another ESC for them to function). Overall this is a great cheap motor for first upgrade without buying ESC, for top speeds but especially for drifting. Higly recomended.