jentegraGS-R

hey i just put a hi-flo cat on and it doesn't have the hole for the secondary O2 sensor...do i need to take it somewhere to get a hole put in? b/c i didn't kno if i should drive around w/o my secondary O2 sensor?

thanks in advance for the help!

Fabrik8

I'm assuming you have an OBD2 car if you have a secondary O2, right? I don't remember but I think you'll throw a CEL if you don't have a functioning/useable secondary O2 sensor on it.. I know on Focuseseses you'll throw a CEL after a little while if you have the O2 sensors too close or not coupled on either side of a cat (i.e. you have a test pipe) and I think most OBD2 cars are the same..

jentegraGS-R

yea i'm just gonna take it somewhere to get a hole put in my cat so i can put the secondary O2 on.

execelon

i have bungs in stock i could do it all for 20bux

Woodrow

Yes you will need a downstream O2 sensor otherwise it will throw a code.

jentegraGS-R

thanks!