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For everyone replacing the bushings or inserts, I really recommend replacing the subframe bolts (PN: 33 32 6 760 340). They are aluminum and no one stated that they are stretch bolts, but when you torque the new ones, you can feel them stretch.
I thought the inserts firmness deteriorated overtime, but it was actually the subframe torx bolts. After I replaced them with the new ones, the rear is tight again.
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BSM 135i - CDV Delete | Bilstein | Eibach | M3 FSB | Whiteline
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