Well, containment is not really an issue as this clutch/flywheel assy. is not at your knees or any other part of your body. Just sayin!Jim: I'm debating between the Safir period-correct aluminum bellhousing and flywheel/clutch vs. a steel Quicktime bellhousing and Centerforce clutch. Steel for greater containment protection and a lighter clutch because the Safir system is supposedly tough to drive on the street, in parking lots, up trailer ramps, etc. Don Hoevel says he has used both options in his Tool Room builds. Curious to hear your driving experience with the Safir. Thx.