I'm been debating for a while whether I like my polished t-stars vs M-parallels.
I found a good deal on M-parallels but don't know if they will fit my car and if they are OEM or not. The guys got them from a friend with a e38 740? he can't seem to find a part number? isn't the part number stamped on the back? He claims they are

staggered 18x8 Et14 and 18x9.5 et26.
Tires are continental Conticontactsports
225/45/18, 255/40/18 rear