Originally Posted by 94civicEX
My exhaust guy talked down High Flow cats like you wouldn't believe, he didn't even think it'd be worth it in my case.
:squint: It seems to me that this exhaust guy is really not a Certified "Exhaust Guy" if he said that, sounds like a un-educated back alley mechanic if you ask me.
Replaceing/Modifying Catilitic Converters is illigal.