If you want your key to look like it was shot through a T-1000 you could always pick up this interesting little guy from FUNFOBSG
https://www.etsy.com/listing/8353063...on0=1630277778
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2013 BMW 335i xdrive M Performance in Melbourne Red - Injen Intake, VRSF intercooler, VRSF Muffler/Resonator delete, VRSF catless downpipe, CTS charge pipes, SPEC stage 2 clutch, Bootmod3 Stage 2 91 Octane tune, Pure 750 turbocharger, Spool LPFP and HPFP, various carbon aero (One of these things is probably not working)