A shake down day on my new set of NT01s at Toronto Motorsports Park. My car is a 08 Mustang GT that is "slightly" modified for track use including a 445 HP Roush Supercharger and a lot of suspension upgrades. By the end of day the clutch had pretty well given up working and failed completely 3 days later. I figure that 25+ track days with that kind of HP is not bad for a stock clutch.