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Old 08-20-2010, 07:03 AM   #1
Scooby Newbie
Member#: 222590
Join Date: Sep 2009
Chapter/Region: South East
Location: Clermont,Fl
2009 Impreza 2.5i
Spark Silver Metallic

Default High Flow Vs No Cat

I plan on changing my exhaust on my car. I plan on putting a high flow cat with and agency power exhaust. Would this throw any check engine lights? Also, what if I was to go cat-less would this throw a check engine light?

Also if the catalytic converter that I get is a 2.25" inlet/outlet and my exhaust is 2.5" piping would I still be able to weld the catalytic converter on? Or does it have to be a 2.5" outlet cat?
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