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Old 08-15-2011, 02:53 AM   #6 (permalink)
brucelidat
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Join Date: Jun 2011
Location: temple city, ca
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Drives: 2011 370z 7AT GM Sp
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Will these be likely to void my warranty or are they relatively safe? Also, a friend of mien said improving my airflow would not only increase my HP, but also my mileage. Is this true? I am not expecting mileage gains, but don't want to hurt my mileage too much either. This car is my DD.
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