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Old 11-28-2012, 09:29 AM   #771
brcewane
Scooby Specialist
 
Member#: 63990
Join Date: Jun 2004
Location: Ontario
Vehicle:
2002 WRX
Flat Grey

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Talking to my speed shop, who has lots of experience racing, they don't think there will be any substantial gains with increasing this pipe diameter. The smaller diameter fit better under the hood.
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