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Old 01-03-2013, 02:08 PM   #1
Scooby Newbie
Member#: 266226
Join Date: Dec 2010
Chapter/Region: Tri-State
Location: east coast
2012 wrx sedan
dark gray metallic

Default SPT catback sufficient for stage 2?

I just got a Perrin catted downpipe on my 2008 installed. I also just realized the SPT catback I have isn't 3" piping throughout. How significant would the gains be if I switched to a full 3" catback?
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