Whats the difference between the 5 and 3 puck ceramic clutch? and generally how many Kms could you expect to get out of one of these clutches. Im running the 3 puck ceramic in my R34GTT and its a daily driven car. Done over 20,000 kms on it so far and no problems i try my best not to slip it and generally try to abuse it and the clutch seems to love it.