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Per Trackjunkie; his slightly used OE clutch assembly was 16.2 lbs, so figure maybe 17 lbs new with factory PP bolts. Which the OE flywheel is usually 17.1 - 17.2 lbs.
That’s roughly 34 lbs total assembled to compare against a race clutch/flywheel assembly, but don’t forget to add in the 3.6 lbs counterweight that most non-OE flywheels require for proper balance.
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Sorry, some of these things I didn’t want to separate fully, mostly was trying to get an accurate unsprung mass number for my car. Not going to post everything since I have some custom stuff like brakes, speedway swaybar, etc. that won’t be applicable for anyone else:
S1 Front Upper Control Arm with Speedsource delrin bushings - 2.6 lbs
S1 Front Lower Control arm with spherical shock bearing/aluminum carrier (factory bushing is heavier) and Powergrid endlink attached - 7.9 lbs
S1 Front upright with wheel hub bolted-on having 2.75” ARP wheel studs, & Motorsports ball joint camber bushing - 16.3 lbs
I have the dashboard out of my car and decided to remove the A/C evaporator assembly while I was in there. It consists of the actual evaporator core, the inlet and outlet pipes which are wrapped in butyl tape, and two allen-head bolts. Total weight for the assembly was just under 5lbs.