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      05-04-2012, 04:50 PM   #10
eyim1988
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Drives: 2022 BMW M4
Join Date: Feb 2011
Location: Los Angeles, CA

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Quote:
Originally Posted by CJ421
I personally wouldn't say it's normal; my AR 4" has been on for almost a year and the car has not acted differently. I have a JB4 (map 2) as well. Mine is a manual transmission, not sure if that is related.
When I had my berk 4" downpipe. I never had any problems either.
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