How do I check whether my AU needs a 3 bolt oxygen sensor or two bolt oxygen sensor on a new set of extractors?

I'm not sure where to check, can anyone post some pics to point me in the right direction?

cheers

the oxy sensor screws in dosent it?

I wonder if you mean 3 pin and 2 pin? for the electrical contact?

if he means wires/pins??
the au is a 4 pin/wire o2 sensor!!!

i'm looking at some extractors, the seller says this:

"they come with an oxygen sensor, they are three bolt not two, so need an adapter , peps have these for about $20 or lukey cat"

will that fit my AU Series 1 1999 Forte ?

or what is this adaptor he is talking about

extractors from ea to au 3.9 or 4.0 are all the same at the exhaust ports. However as far as i am aware none are bolt on to your cat and will require cat converter modifications. My local exhaust joint welded it up for me for about $50.

Easy done

when u say 2 bolt i think your referring to the flange where the headers meet the cat? if thats right it could be a bit of a pain in the a**.

imo just buy some pacies ph4499's or if you wanna spend a bit more ph4480's. i bought ph4499's with a cat that was already modified for $200 later had to be replaced because it was burnt out lol.

google those part numbers for more info and ill link you a useful page below

http://www.bestmufflers.com/Information ... PH4499.htm

http://www.bestmufflers.com/Information ... verter.htm

Check those out

actually, lukey extractors bolt up to the standard cat, they are a short extractor

there is a few different types tho arent there? id rather the longer primaries and secondaries though.

whats up with the 2 rather than 3 bolts tho?