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      05-26-2011, 08:44 AM   #3
mkPOTO
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Drives: BMW M3 | X5 xdrive 35i MSport
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Quote:
Originally Posted by jzbm3 View Post
FYI the ringing noise is only present with a catless x-pipe (not sure about HFCs). The axle-back sounds great if you stick with the OEM x-pipe.

Bump for a great exhaust.
thanks and yes I did hear that, I might get a HFC x-pipe and it does sound great with oem x-pipe
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