The Dinan Dual Exhaust Valve Remote Kit lets you override the factory exhaust valve operation and fully open (or close) the valve at the press of a button. Directly compatible with 'F' and 'G' chassis BMW's using dual electronic valves, the Dinan Dual Exhaust Valve Remote Kit is robust in its potential applications. Once installed simply press the top button of the supplied wireless remote to open the valves fully and enjoy maximum aural pleasure. Alternatively, when the need arises for the exhaust to be as quiet as possible, press the bottom button on the remote and the valves will close. This system works with both the factory exhaust and any aftermarket system that utilizes the factory electronic exhaust valve actuator. Tested and compatible valve actuators include BMW P/N's 18307851568, 18308686640, 18308632154 and 18308623424.