devilsinu Posted August 27, 2009 Share Posted August 27, 2009 I was wondering if anyone out there has put a performance downpipe on their legacy and had issues with the o2 sensor. I bought a cat back and before i put it on i wanna get a downpipe either perrin upper and lower or just the one piece cobb. Any help will be appreciated! Link to comment Share on other sites More sharing options...
RJS5689 Posted August 27, 2009 Share Posted August 27, 2009 Wow.... Search Link to comment Share on other sites More sharing options...
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