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      09-05-2012, 11:30 AM   #2
Delta0311
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Drives: 2011 BMW 335xi E92
Join Date: Apr 2009
Location: NJ

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No you don't the battery has no effect on your exhaust. Diy is not needed the install is straight forwrad. If the shop needs a diy for this then they are probably in the wrong business.
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