Here at Turner we have a growing catalog of universal exhaust components to help you fabricate your custom exhaust setup. For every project, Turner Motorsport is your BMW parts resource!
Take full control of your exhaust sound with the MAD Valve Controller Essentials, a simplified, plug-and-play solution designed around the valve positions enthusiasts use most every day. Unlike the factory system, which constantly opens and closes the exhaust valves based on drive mode, throttle input, and emissions requirements, the MAD Valve Controller lets you lock the valves exactly where you want them. The result is a more consistent exhaust tone, better sound control, and a driving experience that matches your preferences.
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