I own a rs4 racer 2 last time.I sell it away after quite a number of race and bought a GT4w.It doesn't mean that the car is not good,it just can't compare with the other cars.Rs4 is a street car where as GT4,MTX2,V1R,REFLEX,IMPLUSE are track car.Track car will be faster, tougher then street car because of the design.