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DIY: 335i Exhaust Sound Mod. Better, and even easier than golf tee mod.
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03-27-2008, 10:08 PM
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Appropriate
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Drives: 2008 BMW E92 335xi
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Excuse my ignorance, but it sounds like this vacuum valve basically opens up the second tailpipe when additional volumetric exhaust capacity is needed... is that right?
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