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      10-01-2014, 12:42 PM   #6
speedwaywhite
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United_States
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Drives: 2011 X5M, Sapphire/Perf.Bambo
Join Date: Sep 2012
Location: Kansas City, MO

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Lots of posts on this subject - search and you will find. Summary from me and others: money would have been better spent elsewhere. Not a significant change in tone nor volume with x-pipe and resonator delete. My compare is from my M6 (V10) that HOWLED when I did the same...
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