Originally Posted by Autobahn335i
I think they're not officially homologated in the EU either for the E9x platform. For other cars they are.
As for the structural strength of the seat back, I have the BMW Performance seats which are in fact relabeled Recaro "Sportster CS" seats. So that won't be a problem in my case. Nor for anyone else running race seats.
Something else we can't get here...