When I started looking for posts on the forums that talked about changing from dual-mass to single-mass flywheels, everything seemed to be for the M20B25 engines. I have a '87 325e daily driver that has what I call the dual-mass shudder. The condition where when slowly letting out the clutch (like when you are in the drive through line) the car car starts to shudder as if the clutch is not engaging properly. I have been told this is caused by the breakdown of the bonding agent used in the dual-mass flywheel. This is not a list of all items you would want to replace,these are just the clutch items needed to change a E30 325e with dual-mass flywheel to a single-mass flywheel.
Eta single-mass flywheel (confirm that TDC pin is present on side of flywheel)
Pressure Plate 21-21-1-223-026
Clutch Disk 21-21-1-223-114
Release Bearing 21-51-7-521-471
Eta single-mass flywheel (confirm that TDC pin is present on side of flywheel)
Pressure Plate 21-21-1-223-026
Clutch Disk 21-21-1-223-114
Release Bearing 21-51-7-521-471