how many miles have you driven your car with the turbo or s/c on the stock clutch? and how many miles total on your car? i'm tryin to figure a general length of time that my own clutch will last. so far i have 67,000 miles on my 98 lude. about 12,000 of that with the jrsc. i don't race that often nor am i ever too harsh on the clutch for too long, if you know what i mean.