Armytrix has just dropped an exciting teaser video of its upcoming stainless steel, valvetronic exhaust system for the BMW M4 sports car.


Full details about the system will be revealed soon but for now, we know that it comes complete with Armytrix’s valvetronic system. As a result, it will include a Street Mode where the valves will be closed and a Race Mode where the valves will be opened. Additionally an Auto Mode is available where the valves open at a predefined RPM.

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