I've seen the 335 aero kit rear... the pic of the black car is most def an m3. that white pic of the 335 is not a custom rear, its the OEM aero rear with quad. the m3 quad tips stick out further and are arranged closer together.
'06 bsm e90 330xi : 18" VMR CSL : KW V3 : GruppeM Rep Intake : UUC/Corsa Catback : Hartge Lip : ACS Roof Spoiler
OEM CF Trunk Spoiler : CF Emblems. Pillars. Mirror. Grille : LUXER12 led plate : V1 Hardwired : OG.longtran e90post sticker! circa 2005