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Old 07-06-2010, 09:11 AM   #4
OrbitalEllipses
Scooby Guru
 
Member#: 178811
Join Date: Apr 2008
Chapter/Region: MAIC
Location: MoCo
Vehicle:
2013 WRB BRZ
:banana:

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An exhaust change in any 2004+ WRX/STI. However, catbacks are exempt as they don't change much. A downpipe however may cause you to overboost.
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