Scorpion BMW X3M OPF Back Exhaust System (F97)Scorpion Exhausts recently introduced this great value and great quality exhaust system for the BMW F97 X3M that runs from the particulate filters all the way back to the tips. The Scorpion system adds a much louder and fruitier exhaust note and offers a 4. 6kg weight saving over the factory rear silencer. The Scorpion rear silencer is smaller than OEM and when the valves are open, exhaust gases flow straight out without going through the backbox. If