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Old 10-18-2008, 12:53 PM   #3
brantley847
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Drives: 2011 IBM 2SS/RS
Join Date: May 2008
Location: Orlando, FL
Posts: 3,402
has anyone had experience with the GMPP catback as far as performance and sound? I know it may not be as favorable as a flowmaster, but hey....is it really THAT bad?
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