Best way to improve the car is to get a R40. From what I have witnessed from every in my local racing area that has the car, don't waste time or monies trying to improve it. It is a flawed design (taken from the Nitro MT) that HPI should have improved before releasing it in car form. If you plan on just playing with the car, it is fine. If you plan on racing, get the R40 or another car.