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So I did the mod last night, took 2 minutes max. The one thing I did notice was the deeper tones at the low RPMs... but there *almost* seems to be a little drone when you're cruising on the freeway. Not exactly a bad thing, but I can definitely hear the exhaust when I'm even slightly on the gas going 65. Anyone else notice that?
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2013 BMW 335i M-Sport
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