BMW Electronic exhaust valve harnessFor use with the F chassis valved exhaust, for cars that do not come standard with an exhaust valve. This kit comes with an exhaust valve module, and all wiring necessary to control your exhaust valve from within the vehicle. Example, If you ordered an F chassis exhaust for your F30 320i BMW which does not have an exhaust valve, you will use this kit to restore functionality and allow operation of the exhaust valve from within the vehicle.