Personally, I am leasing a 2021 m340i and shortly after I ordered an AWE TRACK EXHAUST, and it sounds absolutely amazing. It’s a pretty much a straight system and cheaper than what you were quoted at the dealership. With parts and labor it ran me around $1900. There’s no muffler but they also have a resonated, and a touring edition that has a muffler. Although, it does cost more. It has clamps so you can take it off and put the oem back on with ease. I also get burbles when downshifting and some aggressive ones in 5th gear. I also plan get a DP and then a tune soon.
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