Originally Posted by kfrazie1
did this and got a service engine soon light after about 500 miles with it unplugged.
Has to be a coincidence. Say you get a DINAN exhaust, which is endorsed by BMW and is covered under their manufacturer warranty. The DINAN exhaust has NO actuator flap and does not control which pipe exhaust comes out of. The actuator is mostly a sound dampener and slightly warms the cats up faster. After that the actuator is mostly for sound. Just my .02 but ready with firesuit.