You can keep the CCC controller but you lose quite a bit of functionality that the CIC brings. I'd spend the $100 or whatever and get the controller without it you're not even using the CIC to it's fullest and why even bother doing the retrofit half-assed for a relatively menial cost in this retrofit?
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'16 M3 | '23 718 Spyder
Past: E92 M3, F87 M2, E39 M5, etc
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