Spring pads in the rear..
I could be wrong as well.
They serve to locate the spring on the strut and eliminate metal-to-metal contact. No height adjustment capability though.
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They’re readily identifiable in situ by the nubs or **** molded into their perimeter.
210 325 01 84 = 5mm/#1
210 325 02 84 = 9mm/#2
210 325 03 84 = 13mm/#3
210 325 04 84 = 17mm/#4
Note there’s also very thin shim/insulator/pad (204 324 01 84) installed at the bottom of the springs where they seat in their arms.
I've also used 'em topside to tweak ride height and adjust corner weights.




