The car is a heavily modified Ultima GTR with a body closer to a Le Mans prototype race car, and it's got the engine out of a Lamborghini. Jon reported that it was fantastic in the snow, to a point where the helicopter that was filming him actually had a hard time keeping up. Amazing.
Aaron Miller is the Rides editor for Supercompressor. If he could do stuff like this on a daily basis, he would, but he probably wouldn't live very long.