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Old 05-11-2013, 12:52 PM   #13 (permalink)
Mitco39
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Join Date: Aug 2012
Location: Edmonton Alberta Canada
Posts: 2,089
Drives: 40th 370z
Rep Power: 132
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You could be hearing a bit of an exhaust leak that seals up once it gets hot. The car will be louder for the first little while, but it shouldnt sound aweful. Infact I love the deep rumble. haha.
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