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If you already have Bilsteins installed and just need them repaired/refreshed you can send them to the Bilstein Technical Center in SoCal. Depending on time of year it can take a bit to get them back but the service is top notch. Had mine done a few years ago for something like $100/shock.
Just got a set of rebuilt early Bilsteins back from rebuilding- $405 including new lower bushings. Asked them not to paint them, like the patina look but they have all new guts in them.
Notes from Bilstein, for whatever it's worth:
All four dampers are in good condition for service.
Lower mount bushings on green dampers need to be replaced with E4-GV1-Z059A00.
Lower mount bushing on the other pair are marginal and we would recommend replacement as well (E4-GV1-Z059A01).
4 x SA001 REBUILD STANDARD SHOCK - $95.00/each = $380.00
2 x E4-GV1-Z059A00 Gummimetallverbindung - $6.48/each = $12.96
2 x E4-GV1-Z059A01 Gummimetallverbindung - $4.65/each = $9.30
Anywho I just took delivery on them today. Gonna do 1 turn firm on the front and start with a 1/4 turn in the back. Then I'll put some new threaded collars on them. Last I saw, these need to be JB Welded in place.
Google translation say: Gummimetallverbindung means rubber-to-metal compound.
I think that is a bad translation, it should be rubber-to-metal-connection.
Åke
What's going on with the current inventory for Bilstein shocks? I cannot find a set of rear shocks anywhere for an S4. Assuming this is supply chain related, or did Bilstein stop producing them for 928s?
BILSTEIN B6 front and rear are available right now 😊