Thread: RPI mounted
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      08-27-2012, 01:17 PM   #24
smellyborrelli
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Drives: 2008 135i
Join Date: Sep 2011
Location: south jersey

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its hard to compare , the RPis are a helluva lot louder. but in a very good way. The Diablos are perfect if you just want a little rumble on top of the stock sound. Both have some low RPM drone. It doesn't bother me though, I think some people on here are just sensitive haha.
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