what is this tube comming out off this cat

just wondering

 

free bump, curious also

 

is there an opening??

 

i think some cars have the cat that recirculates some of the gasses to ensure proper emmissions?? I think I read it somewhere. Sounds like thats what its for?

 

Its a air injection port. You hook up a a hose and feed air into it to dilute the fumes to pass smog.

 

thanks for the replies
i was just thinking of using it to relieve some crankcase pressure what do you guys think

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 00 FBP ItR &raquo;</TD></TR><TR><TD CLASS="quote">Its a air injection port. You hook up a a hose and feed air into it to dilute the fumes to pass smog. </TD></TR></TABLE>

Air injection port would be my guess as well. One thing to note though is how a catalytic converter really works. It actually needs O2 to oxidize the pollutants....it does not "dilute the fumes to pass smog".