dyno basically simulates driving up an extremely steep hill or towing a very heavy load to see how fast the car can accelerate an get its power numbers.

in that video he's probably going atleast 100 mph when the tires start to spin.

so think of it this way..his car in the dry with slicks can spin the tires at 100+ mph while going up an extremely steep hill

 

and i do believe its still a v6 car.

runs low 8s on the stock steel body