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      11-21-2012, 02:27 PM   #1
Red_Baron
M3Post Handyman (LucWERKZ)
 
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Drives: e70 X5 4.8i (Temporarily)
Join Date: Dec 2011
Location: DC/VA/MD/PA

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Noise changes past 70k miles?

I have a little over 72,000 miles on my M3 and lately I've started to notice that it sounds a little different at past 4k rpms. It went from a deep sound to a higher pitch sound almost italian like. Is this something I should worry about? Is my engine going to blow up? *knocks on wood* Car drives just fine, no other weird noises. Almost as if I just changed the muffler.

Also I have the OEM perf pipes mod. No engine mods and stock airbox, cats, and resonators.
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