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where are you getting the information that they do a B4"S"?
the B4 is the OEM replacement line, ive never seen a shortened "OEM" replacement, their shortened shocks are the B8's (as if you shorten the shock you have to up the damping rate it to get the same performance, so its no longer an OEM replacement)
the B4S isnt mentioned anywhere on Bilsteins website or product line information, and any searching i do only links to a thread on E90Post?
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