[marconi118]

I am trying to understand how different are the springs + shocks of M3 E90 92 93 and 1M

The E92 M3 has generally X1 or X2 springs that are quite low rate.
Recently purchased a full E90 M3 suspension, springs are front Y4 and rear Y1, both have 1mm thicker wire than the E92.

So my first conclusion is that the E90 has firmer springs and firmer dampers than the E92.

Could everyone post here the marking on the spring and type of car (E90 E92 1M EDC non EDC, ZCP, Japan etc...)

This could help me and others understanding....