Thread: OBD Flash Tune From Active Autowerke **No ECU REMOVAL REQUIRED**
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      06-16-2018, 10:28 PM   #35
WalkerB58
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Drives: 2021 m340i G20
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I've heard of smelling exhaust fumes with catless down pipes. Is there any truth to this? I'm wanting to bite the bullet but would like to confirm the fume issue.
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