when being driven by the pro Mark Leader, Mark was able to hook the car up, getting a higher MPH due to his excellent traction skills. When I drove the car (yeah I suck) I would get a MPH of 101-103 due my awful traction. When I hit 103 it was my best 60ft and better traction off the line. When I hit the lower MPH it was a really bad 60ft and alot of rear end action. When Mark got in it he hooked up nicely and achieved the way better MPH. Tested and approved w/ my car Saturday.