Scorpion Exhaust System For BMW G80/G81 M3 & G82/G83 M4Scorpion Exhausts recently introduced this great value and great quality exhaust system for the BMW G80 G81 M3 & G82 G83 M4 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 3. 9kg 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