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Old 01-03-2014, 07:16 PM   #8
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Join Date: Oct 2009
Location: A city
Posts: 84
When I installed it in my E46 325Ci, I followed all the steps in the manual (let it sit for ~10 min) to get the computer to adjust to the increased air flow. After that it sounded amazing and made a sweet whooshing sound when you hit the gas.
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