I put kw V1s on last Dec. which markedly improved the floaty feeling, but still feel some sway in curves compared to my prior e92 non-x. Based on yours and others comments, am thinking of doing the rear M3 sway. However, a guy who runs a specialty bmw shop near me actually recommended against it, but I think he may not be as familiar with x-drive issues with suspension. How much should install run?
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