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      07-26-2012, 09:53 AM   #3
blumango
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Drives: BMW 130i Coupe
Join Date: Oct 2010
Location: Earth

Posts: 37
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I just got one installed and you are right....the car now feels so much better and quicker! However, there seems to be a loud and consistent "Zing" noise whenever I get to a certain rpm range....doesn't seem like a rattle but there is this zinging noise which takes away a lot of attention from my muffler noise. Is this normal?
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