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      03-01-2013, 02:20 AM   #19
Crewchief05
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Drives: 335i e90
Join Date: Dec 2012
Location: Arkansas

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08 335i  [0.00]
With "Vibrant resonators + side branched + 3inch muffler delete" would this add any power. Or is it simply for sound? What allows other exhaust to add power that this wouldn't?
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