[J Persons]

I'm using a Centerforce billet flywheel, disc and pressure plate. I've had it over 7200 RPM without any issues, and it shifted fine. For a steel flywheel, I prefer the Centerforce unit, they don't use a cast in or bolted on imbalance weight. Instead, they drill a series of balance holes to lighten one side. This tends to spread the imbalance over a larger area instead of concentrating the imbalance in one area. Makes for a smoother engine, IMO.