Hi,
I need to replace my front cat pipe and wondered if anyone had a guide or "tricks of the trade" for doing the job (short cuts, what needs removing, etc). I'm asking as I had a look at it earlier and it looks a right pain in the a***!!!
It's on a 1994 wrx.

Any help would be great,
Cheers

 

not 2 bad just loads of wd40 on the nuts

 

A good quality 6 sided socket will be very useful to.

What are you replacing it with? Are you aware that a MY94 import requires no cats what so ever!

 

mine is a 1993 import and mot man gets it evry time on cats

 

Tell him to do a refresher course. Or read the following link.

https://www.scoobynet.com/non-scooby...t-testers.html

 

I knew it !! I had this problem last year when I took it for an MOT. I was sure that I could de-cat the car. I've used the same tester for all my cars through the years and I don't want to fall out with him but I want to get rid of the cat. he's already failed it on emissions once !!

 

That's not so bad if you get on with your tester, you can explain to him (Possibly before your MOT is due). Not like the numpty i had.

 

It's a shame I've just spent out on a cat pipe when I should've been buying a de-cat !!!
So,my car may still fail as the pass criteria is for a later impreza ?

 

Your car is pre 95 import and therefor should be tested as such. As explained in the above link, the Emissions handbook/database is a UK publication and holds information on UK/EU vehicles only.

How do you conclude that 'the pass criteria is for a later impreza'??

 

Sorry. What I meant was that because of the MOT tester selecting the wrong car on the emissions test, the diagnosis limits that the car has to stay within are to strict as he is testing it as a later model, correct ??!!

 

Arrrr, yes correct. A Non Cat Test consists of idle check only. No fast idle of any kind. As opposed to a Cat Test where they hold the revs up for a while.

 

Hi mate. I used this guide when I changed my downpipe and uppipe ....

http://www.scoobymods.com/best-damn-...49.html?t=6649

It's for a Newage but the principal is the same. The comment about a decent six sided socket is really useful !! I am glad I had some for my rusty nuts !

Cheers,

Wilky.