I used to come off the line, side-stepping the clutch at over 5500 rpms on a low 11 second RoadRunner for years with a stock flywheel with no problem. Never heard of one coming apart. If you are just going to beat on it on the street once in a while or even with slicks at the track infrequently, I would not worry about it one bit...even if it has some crazing in it.