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Old 11-29-2012, 05:32 PM   #5
Alex323Ci
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Join Date: Jan 2005
Location: Huntington Beach -Surf City USA
Posts: 16,790
My Ride: M3 & 323Ci (sold)
the Bilstein Sports are just built for the shorter travel of a lowering spring while the HD aren't. So like they said above it's the same internal valving but made optimally for a shoter spring. Other thing is that Bilsteins have internal bumpstops incorporated while other companies have external bumpstops that one has to replace or cut if going lower.
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