Bilstein PSS. Didn't feel like spending the money for PSS10's. No reason for moderate weekend driving. These are a great balance, not too stiff, not too soft. Performed great at the track and are comfortable riding around town. I've got no problem with them. Plus they are height adjustable, not that I've played with that at all since setting a little bit below stock.
Z4M Front control arm bushing's. Honestly, no opinion there. Get them if you feel like it and maybe they are "more durable." I didn't notice anything, but then again my originals were in good shape. Definitely get the Rogue engineering rear shock mounts and BMW reinforcement plates regardless of whichever kit you end up with. Those are a must.
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