I had some new Bilstein B8’s sitting around for a year and I finally got them installed with Eibach springs. During the install process I like to compare the OE tune vs the Bilstein tune by pushing down on on each shock. The old squat dyno test…I noticed the Bilstein tune was very firm (slow) on the compression and very soft (fast) rebound when compared to the OE tune. The Bilstein rebound took 2 seconds were as the OE took over 6 seconds to reach full extension from full compression. It seems to me that Bilstein might have got the valving flipped by mistake. The car does not handle proper with these installed as it just bounces around. I put the OE rear shocks back on with the B8’s still up front and still running Eibach springs. The car handles 90% better. I chalk this up to a little miss match in shock tunes. I even noticed the rear end ride height dropped when removing the B8’s for the OE shocks. I’ll probably put the OE front struts back on if Bilstein does not come through with a replacement. Has anyone else noticed this problem with their rear B8’s?
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