[Henry Schmidt]

I've seen my fair share of aluminum flywheel failures. It doesn't seem to matter which brand. The issue is always the engineering behind the flywheel and the application. Generally if you must run an aluminum flywheel (not sure why) they seem to last better with a push style clutch as apposed to a pull style. Since no 911 engine with a 9 bolt flywheel came with a push style clutch, installing an aluminum flywheel for high performance applications becomes a challenge.