sorry i dont know what they are really called, they look like steel dowels. On my stock 2.4 flywheel i had 3 steels dowles sticking out of the flywheel, i'm pretty sure they are there to hold the pressure plate on the flywheel, so its aligned properly. but when i went to get the flywheel resurfaced and when i got it back, they were missing. just a empty hole where they use to be. Are they important??? i have another flywheel that i dont need anymore, are they easy to pull out?