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BMW 3-Series (E90 E92) Forum
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catless downpipe sounds
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04-22-2009, 01:57 AM | #3 |
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Drives: Space Grey e92 335i
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you might have crossed o2 sensors. That's what happened to me and it sounded like shit. You should double check those, but yea catless dp's are much more audible. May take a week or two to settle also.
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04-22-2009, 02:07 AM | #5 |
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