It seems as if the Cyclone will be the hot car for the HPI Hot Bodies camp. As far as the quality of the Pro 4 kit is concerned, it is rock solid. In fact the Pro 4 is a great car. I have seen some very talented racers run the Velocity 4.5 with no complaints. One car developed a mechanical issue after the driver hit a dot flipping the car on it's lid followed by a 15ft. slide into the wall. But that was pure driver error. The big beef with the Pro 4 is that it is a shaft driven design. The current trend seems to be in favor of the belt driven sedans.
llamont