I believe the rear of the X5M, which this bolts directly to, is a bore of 72.6 and the non-M is 74.1. Based on that, I think these would have to be bored out or run with a spacer that adjusted the hub size. These kits seem to run $100 from my very quick search from reputable places. I could be wrong in any of the above as I haven't actually tried mounting them on anything except my e70 X5M.
I believe these will also bolt directly up to the e71 X6 (both M and non-M), but again, haven't tried that either so someone else would have to confirm.
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