I'm stock non adaptive suspension. Another reference:
https://www.e90post.com/forums/forumdisplay.php?f=12 The lower the ET further out. higher closer in. ET 50 may be too close to suspension. a lot of folks go with ET 35 all around.
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2011 35i BMS High & Low side OCC, Custom tune, CDV delete, Eldor coils, ER Charge Pipe w/Tial BOV, ER Comp. FMIC, K&N drop in,40W LED Halo, LCI side markers, M-Factory LSD, NGK plugs, Racing Dynamics strut brace, Stubby, Windrestrictor