The carrier (shifter arm) for the BMW performance assembly must be replaced. I'm not sure if the 1M has the same part. The ssk was my first mod tho, and it is awesome.
Here is your break down:
Item #1 is the carrier. ( Shifting arm, reinforced 25117590609) The 08' unit is a different part number. ( SHIFTING ARM 25117524720) If you could find the part number for the performance piece, maybe we could tell if it works. Maybe the M has the performance piece already.
Parts here:
http://www.realoem.com/bmw/showparts...28&hg=25&fg=05
My tablet can't copy all the pics so hope this helps.