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Considering custom exhaust mod
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02-06-2015, 09:18 PM
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DeutschRennfahrer
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Drives: 2006 Z4 3.0i - Saphire Black
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If I decide to leave the cats and simply replace the stock muffler box with a Magnaflow, will I really notice that much of a difference in sound as apposed to removing the secondary cat?
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