This is the Force Dynamics 401 motion platform. It has four axes - roll, pitch, heave (vertical) and yaw. The 180 degrees of yaw allow the machine to closely track the car's rotation, which lets you feel exactly how the car is moving and where it is on track.
In this video, a fairly powerful (~1100lbs, 450hp) car was set up 'loose' with little grip to accentuate the rotation capability of the machine.
Note how the platform 'washes out' to a neutral position to avoid winding up.
Visit www.force-dynamics.com for more information!