[Aussie Mike]

An SFI approved explosion proof flywheel is a must in my opinion. The flywheel pictured is a factory cast steel flywheel and with the torture it was probably getting in the Bankstown Macdonald's Carpark (or possibly Camblefield Macdonald's) it's no wonder it went bang.

It's cheap insurance to fit a steel billet flywheel and these things are certified beyond 10,000RPM. If the clutch hat explodes it's doesn't have nearly the inertia as it's smaller diameter and lighter weight. The pressure ring is the heaciest part of the clutch hat but the input shaft runs through the center of it so it's less likely to leave the vicinity of the bell housing.

Cheers