I'm happy enough With my NPC Flywheel
Billet with cooling vents in the centre for my NPC single plate button. It was more a piece of mind thing for me over anything else. Im not really chucking out the power to be throwing flywheels around but nice to have a new one, and know that at least im getting some cool air to the centre of the clutch.
Rev wise, its a bit more responsive but not a great deal that I can tell..... Mine weighs 6.6kg, been meaning to weigh the stock flywheel, has anyone got a weight for it? Dont think its much heavier but