Yes Because the butterfly valve of BMW exhaust pipe is always open, the butterfly valve of BMW exhaust pipe will be broken. BMW, called Bavarian Engine Factory Co., Ltd. in Chinese, is a German automobile brand. There are four models, I, X, Z and pure digital, including 1, 2, 3, 4, 5, 6, 7 and 8, as well as the M series (the official high-performance refitting department of BMW) and BMW.