Strut inserts for Bilstein assemblies go in "upside down" and secure with a roll pin at the bottom. Bilstien inserts for Boge assemblies go in the traditional way. For rears you replace the whole assemblies, and they all look the same (Bilstien, Boge, Koni). Impossible to mess up in the rear.
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Chris M
1985 911 Carrera with a couple cosmetic only mods
2006 E90 330i
1999 E46 328i
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