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BMW 3-Series (E90 E92) Forum
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2 mufflers on e90 I
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07-16-2016, 04:08 AM | #23 |
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07-16-2016, 09:16 AM | #25 |
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In my experience, shy away from 3" piping, that's like trying to blow air out of one of those boba straws, go with 2"-2.5" to get it raspier and higher pitched
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07-16-2016, 11:36 AM | #26 | |
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07-16-2016, 12:30 PM | #27 |
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07-16-2016, 02:55 PM | #28 |
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07-17-2016, 02:08 PM | #29 |
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07-18-2016, 01:03 PM | #31 | |
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