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No exhaust should "void" a warranty unless something absolutely drastic should happen. If you're worried about that tho, go for the MPE as mentioned above and have BMW install it.
You'll forego the other options w quad tips and slightly more tame sound but is still a great option!
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2020 M340xi PB (sold)
2020 Ram 1500 Laramie (Daily)
2019 Shelby GT350R (Weekend)
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