All that stuff can be purchased and installed by any competent DIYer. There was no short shift kit in the BMW catalog, just the knob.
https://www.bmwblog.com/2014/04/01/n...ies-coupe-f22/ Link shows a decent list of the M perf. goods with part numbers.
Brake caliper color (red, orange,yellow), muffler embossed with M performance are good signs there's actual performance parts and not just appearance. Grille being black is a thing 90% of owners do so that is not a good indicator.