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      03-21-2024, 08:20 PM   #2
tjbuggy2b
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Drives: 2018 540i xDrive M Sport
Join Date: Nov 2010
Location: Columbus, OH

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I... Woudn't really take advice from an Autozone employee, in general. I'm not an expert but I watch A LOT of car build/mod youtube and I've never hear this. Maybe it's an extension of the age old "back pressure" argument?

Anyway, I wouldn't go straight pipes/muffler delete, either way. Sounds like garbage on these cars, imo.
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