funny how different an engine can be with not just tune but physical add ons. I haven't heard of a stock 1M going into limp mode with its radiators + fan upgrade and transmission case with extra cooling while the regular N54 cars all attend the limp mode party
Just goes to show what BMW market research says about Z series owners that we don't get any of the performance gear even in the 35is model
EDIT even the standard 135 gets "better" brake calipers and the 335 sedan family hauler has larger brake rotors