It's the Bluetooth remote control for the exhaust valves on the 210 Challenge Edition, I may be wrong but you may also get this with the JCW Pro Exhaust? I'm probably wrong cause that was just a pure guess.
This intrigues me, I have the F56 JCW, but I am not familiar with the pro exhaust. Is it a factory option? Is there an increase in performance by using it, or is it simply sound? I don't remember seeing it offered when I was building the JCW online.
The pro exhaust was launched on the Challenge 210 then they released it for sale for any Cooper s and JCW f56, when fitting to a Cooper s you also get a tweaked ecu and some very small engine mods to give you extra power, fitting it to the JCW won't give any extra power I don't think but it will make it sound much better
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