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      09-01-2012, 11:21 PM   #1
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rjd598's Avatar

Drives: E90 M3/ F30 328i
Join Date: Jan 2009
Location: San Diego,CA

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2016 BMW 328i  [0.00]
2010 BMW M3  [4.50]
Official db Reading Thread

So I downloaded the iPhone app: Decibels by David Bannach. I created this thread so that it serves as a guide for how loud aftermarket exhausts are. Since videos never do justice of how an exhaust sounds so I thought at least we can see how much louder they are than stock in further aiding the decision buying process. As a rule of thumb lets keep this app and keep the phone about a foot away from the exhaust. My results:

Stock Exhaust:

Cold start:90db


If anyone wants more revs or other readings let me know for the stock exhaust. I know this app may not be the most accurate but if we all use the same one and all get the readings from about a foot away from the exhaust we will have a good basis of how different exhausts are read. Everyone post!