putting a cat in the testpipe would NOT do a damn thing for your oxygen sensors sense they are both in the downpipe and just monitor the main cat in there. and I have yet to see a Check engine light with either downpipe cp-e or corksport.
I was thinking more about New york state inspection We have some hardasses. I couldn't pass one year because it was " incomplete " whatever that meant. I did look into the antifoul w/ CS an i'm ok. thanks. RR
