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Old 01-15-2013, 09:11 PM   #2
FastHackem
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Join Date: May 2011
Location: Richmond, TX
Posts: 674
My Ride: E60 M5
If you weld in some cats after the headers and relocate the post cat sensors to well, after the new cats, why wouldn't it work?
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2006 M5
2005 Impreza WRX
2002 330i
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