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Old 10-21-2008, 01:26 AM   #45
Isshinryu
 
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Drives: 2010 Camaro SS/RS yellow/black
Join Date: Oct 2008
Location: Michigan
Posts: 68
I believe that the catback exhaust you would order is put on by the dealer to get around the federal requirement limts. Also I believe that having the the dealership install the exhaust system keeps from voiding the warrenty.
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