Long term reliability of complex M3/M4 exhaust
While I am gobsmacked by the engineering described here, you've got to wonder how underbody corrosion will effect the reliability of the open/close exhaust gate system. The cost to replace this muffler won't be small, and you really need the exhaust system working 100% for the car to run properly. In North America, we use way more salt than in Europe, and exhaust systems pay the price.
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