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Old 12-03-2002, 04:25 PM   #6
Kostamojen
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Member#: 2272
Join Date: Sep 2000
Chapter/Region: BAIC
Location: Mars
Vehicle:
2013 Subaru BRZ
Galaxy Blue

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If you were running a full exhaust system I think 3" would be better, but with just the catback you dont really need over 2.5"
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