Last time at the track I did my burn out (about 4 sec). Got to the line. When I launched there was NO clutch responce at all. I was 100% off the clutch and my car didn't move an inch. I had to tap the clutch again then it grabbed and took off. I have also notice that if I rev my car to a high rmp for a burn-out or in nuetral just for fun my clutch after wont grab till I'm 90% off. This only happens sometimes. Has anyone else with a M6 felt this same thing I am talking about or know why it happens.