Catalytic converter

[Jack4688]

Forgive my ignorance but are there any differences between an S2 coupe cat and an S2 Avant cat? My Avant will need one come MOT time (not until Feb) and I can't seem to find Avant ones anywhere. S2 Coupe cats seem to be easy to find however, while not hideously expensive... any advice or words of wisdom?

[Christophski]

Yep... Find a friendly mot station? Lol

[Jack4688]

That was the idea suggested by Trist when I bought this Avant off him but I don't want to be at the mercy of an MOT centre that knows I probably can't go anywhere else

[rxl]

coupe had 2 different aby and 3b... so look for the aby ones

[Jack4688]

Will an ABY coupe one be suitable for my Avant then?

[S2TORNADO]

those ebay copies must be rubbish.
genuine ones weigh in not far from those prices.

[UrS4boy]

OE 3B, AAN, ABY and ADU Exhaust Components: a consolidation of info.

coupe had 2 different aby and 3b... so look for the aby ones

I think 3B S2 cats were significantly different than the ABY cats, as shown in the link and the two diagrams below. The ABY cats were the same for the coupe and the avant.

OE 3B, AAN, ABY and ADU Exhaust Components: a consolidation of info.

http://forums.quattroworld.com/s4s6/msgs/196904.phtml

3B:


ABY:

[s2driveruk]

yup 3b and aby cats are definitely different...the aby ones are handed, one for each side whereas the 3b ones can go either side.

[rj scotty]

CAT's?......................................ah yes I remember those

[A80Avant]

I was also considering in using 2x100 cell cats instead of the current 200 cell that I have. Would they make a worthwhile difference in backpressure?

[Jack4688]

Of course, no cat on a 3B! Thanks David Well at least I now know any S2 cat will do now, got plenty of time to sort it out though. Thanks for the help everyone

[sidrick]

Of course, no cat on a 3B! Thanks David Well at least I now know any S2 cat will do now, got plenty of time to sort it out though. Thanks for the help everyone

Have another read

[Jack4688]

Yeah posted that then saw the replies in between

[Jack4688]

...hence why the first few words of this thread were "Forgive my ignorance"

[Rusty]

I was also considering in using 2x100 cell cats instead of the current 200 cell that I have. Would they make a worthwhile difference in backpressure?

I ran a 100 for a bit and it lasted about 3 years or 4000 miles. Not impressed.