Nothing really, just stick some drift wheels on there. These are just plastic wheels so they have no grip, vs the rubber ones designed for grip racing.
Some people lock the rear diff, this means that both the rear wheels spin at the same speed no matter what. A normal diff can spin the wheels at different speeds for better handing going around corners.
I leave my setup the same other then the wheels because i still want to do grip racing and i dont own two cars... yet..
