It simply controls the opening and closing of the valves. It costs $500 USD. Quite expensive when if all you want is open valves, you can disconnect the wires. So it's really only for those who want to be able to switch between open and closed on the go, without switching between Sport Plus (open all the time. and Efficiency (closed except for under hard throttle).
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2020 BMW X3M Competition ///M - ALPINE WHITE / SAKHIR ORANGE
Past: 18' BMW M3CS | 18' BMW X5M | '17 BMW M3 Competition | '16 Mercedes GLC250 | '16 BMW X5M | '15 BMW X5 M50d | '14 Audi SQ5
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