Kalil, good shots. You know what I ended up doing, though? I plugged the relay output and paid a muffler guy $50 to slice off the pipe with the flap, remove it and weld it back on with a small connector to keep the length right. No mechanical worries, now. Car sounds great.

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550i . Sport . Nav . L7 . Sirius . Cold . Eibachs . Bilsteins . 19" TSW . K&N . MTech V3