ok, it looks like you are right. Sorry. But I thought some guys with the N55 6MT had installed the Perf SSK ? Maybe not. ???
What still strikes me as odd is that BMW said the 1M uses a new lightweigh and dry sump 6MT trans. When clearly it uses the SAME trans as the N55 135i does.
www.realoem.com
2008 135i 6MT trans part #23007581860 Rmfd-6 speed gearbox GS6-53BZ - TJGK
2009 135i 6MT trans part #23007581860 Rmfd-6 speed gearbox GS6-53BZ - TJGK
2010 135i 6MT trans part #23007581860 Rmfd-6 speed gearbox GS6-53BZ - TJGK
2011 135i 6MT trans part #23007599342 Rmfd-6 speed gearbox GS6-45BZ - THD4
2012 135i 6MT trans part #23007599342 Rmfd-6 speed gearbox GS6-45BZ - THD4
2011 1M 6MT trans part #23007599342 Rmfd-6 speed gearbox GS6-45BZ - THD4