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Old 02-16-2011, 05:02 PM   #123
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Member Sales Rating: (17)
Member#: 261612
Join Date: Oct 2010
Location: Minneapolis, MN
2002 WRX - 750WHP
9.5s @ 150mph


Dual wall is a flared tip, similar to the SPT exhaust or the OEM 2011 sedan exhaust.

Otherwise you just have a pipe that is cut off, like the COBB or Perrin (or many others).
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