The first three pics are definitely manipulated. From the front wheels, we can tell the car is cornering. It is impossible to get a dead-sharp moving AND cornering vehicle on a long exposure, because the perspective of the car is changing wrt to the camera over the time the shutter is open for the background to blur.
The easiest way to do those shots would be to shoot the cars at high-enough shutter speeds and stick them on moving background pictures.