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      07-29-2010, 12:24 PM   #2
TurboHank
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Taiwan
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Drives: 2011MY Z4 35i M sports pkg
Join Date: Jan 2010
Location: San Francisco

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If you want to enhance the sound of your engine, you might got with the BMS dual cone air intake. They supposedly make this high pitched whining sound. On the other hand, if you want super quick install but not much sound improvement, do a drop in filter into your factory air box, ITG or K&N brands.
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