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In sorting through my parts stash I came across two sets of strut mount bearings. I'll be converting my car to asymmetric bearings ('74 style), but I thought these may be useful to someone. Before I list them for sale, I'd like to know if the cracks in the rubber along the bottom side result in significant performance issues (I don't knowingly sell junk). The crack is just on the surface (~.02" deep). Here's the worst looking one:

Thought you had a '74 model to start with Bill?

Anyways, as I see it, these are just surface ripples that only are there because the outer layer (black stuff) is hardenend by some sort of paint..
They are not there because of hard abuse I suppose