I don't have Evo XLs, or a M3 but I got OMP WRC-Rs in my 1 series, which everyone said was impossible.
For floor mounts the Bimmerworld ones have the most flexibility, with VAC just behind. For side mounts I used a basic OMP unit and turned the inside two 180* (and swapped sides) so they didn't interfere with the trans tunnel. This allowed me to move the seats slightly inward to get them to clear the door cards.
https://www.pegasusautoracing.com/pr...RoCyccQAvD_BwE