I don't think that's the 1m rotor...i think it's the rotor from the brake perf kit for the 3 series which has a floating rotor. Always wonder why they didn't make it for our car..i figured the hats were different, but if all thats needed to make them work is that little addapter...could be a good deal for us track day junkies that want a cheaper floating rotor than the rb's
