Originally Posted by lcrain
Any idea if these would be compatible with the 1M? I know the M3 and 1M share most (all?) suspension components, but obviously the weight difference would affect the spring rates...Wasn't planning to buy new shocks any time soon but this is a great deal.
Yes, M3 and 1M suspensions are compatible. They use the same F stock upper spring/damper mounts (as well aftermarket camber plates) and lower strut mounts (1M uses the M3 steering knuckle). The R upper damper mounts also are the same (two cylindrical bushings preloaded by two "washers") as well as the lower damper mounts (1M uses the M3 rear lower control arm).
As for spring rates, are you looking for a street or dual-purpose setup?