so at last i have managed to win one on fleabay ....

is there anything i need extra or advice when i come to change it

 

New gaskets would be an idea or a tube of exhaust jointing compound.

 

Try to be gentle when you take out the Lambda sensor in the catted-pipe,the threads can and do strip because they have been in a few years,

i ended up moddifying my old one because of this.
At first i bourght an aftermarket sensor to put in to the decat pipe but it was very temremental,in the end i had to diamond file my threads on the original one so as it would cleanly screw back in and the cel light would stay off.

By the way my was a bug eye 02 plate

 

does my 95 wrx have a sensor in the centre section ???

cos i cant see anything

 

No mate - nothing in the centre section. Just a straight swap - and as mentioned, get some new gaskets

 

you most probably need a donut gasket which you need to get from a dealer

 

I am sorry if i mislead you, i didnt know it was a 95wrx as you didnt mention the year,my mistake.