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      05-04-2012, 04:50 PM   #10
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eyim1988's Avatar
Drives: 2013 335i M Sport
Join Date: Feb 2011
Location: Los Angeles, CA

Posts: 1,529
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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.
Current: 2013 335i 6mt msport
BMS Clutch Stop, JB4, Slightly Modified OEM Muffler, ER Downpipe

Past: 2011 335i coupe
369 whp/444 torque. (Procede, Custom Turboback Exhaust, BMS Intake, ER FMIC)
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