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Discussion Starter #1
Hi all. I've just dropped my 164 off at a garage next to work after enquiring if they could source a second hand cat for my 164 (if the 164 is rare in the UK, here in Spain they are as rare as rocking horse poo), but instead they tell me they could fit a universal cat for around 125 Euros (peanuts!). :thumbs:

Has anyone done this and should I be aware of anything? I am worried that if not correctly matched to the OEM cat, it could restrict the flow and cause no end of trouble. Should/can it be oversized to be on the safe side?

As I say, fairly urgent as the car is there now. :) Thanks all!
 

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If it is the right size, it should be fine.
 

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Discussion Starter #3
Thanks David. Anyone else? :)
 

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Discussion Starter #4
No more urgency. They don't have the one I need and have to order. 200 Euros in the end so still a pretty good price!
 

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Pity, I have a new unused pattern one surplus to requirements.as advertised on ebay .It has the double pipe connection to the downpipes with 6 bolts,
You could have had it very cheap.
The Alfa part would cost about £600,which some Alfa specialists insist on fitting.
Maybe you should have waited for a few more replies based on experience with the universal cat.
 

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Discussion Starter #6
I haven't paid yet so I may be able to cancel the order. You have a PM!! :)
 

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I've been told a story about cheap aftermarket cats...

When the car did it's type approval emissions test, it would have had to meet requirements for emissions of CO, unburned hydrocarbons and oxides of nitrogen. The MOT test in most (if not all?) EC countries, only checks for CO and unbrurned hydrocarbons - the gas analysers for the oxides of nitrogen eing pretty expensive). One of the most expensive elements in a cat is the one that sorts out these oxides of nitrogen, so as nobody checks, they just leave that out! I don't, therefore, think it will bother the car, although a cheap cat might (as has already been said) have other shortcomings. Best thing to do is try to peer down it with a torch and look at the holes in the substrate brick. If they look the same size or a bigger open area that the original, it's probably worth risking (unless your environental conscience won't let you sleep at night 'cause of the nitrogen oxide emissions)!
 

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Some years ago I had a situation with a Land rover Defender which for some reason rolled out of the factory without a cat(long story). So when it came to sticking an MOT on it I had some kind of a mission getting the right bits I needed at a reasonable price. Someone pointed out about these after market cats which came in different sizes (oval or round...pipe size diameters,etc). I bought two and proceeded to do some fabrication work on the carburettored v8 which took a couple of days since the car was not suited for them. I went to a mates garage where he promptly stuck it on the gas machine, it was so good that the co went down to 0.00 when hot. That was in 2001 and it still passes emissions tests to this day, so I see no reason as to why you cannot use an after market cat... I know the price difference is ridiculous too. I hope this helps
 

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Discussion Starter #9
Thanks for the input guys! Very useful information. These guys seem honest enough as they have special ordered one to match the OE cat and have not tried to sort me out with a quick bodge job with something they had in stock. It needs to go in for an MOT straight after so I should get a quick result if it doesn't work out. New lambda probe (proper Bosch part) going in too.
 

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I had a universal cat fitted to my 164 Twinspark last summer. The car passed emissions and goes fine. However
the new cat gave an unpleasant tinny resonance to the exhaust in place of the usual Alfa rasp. After 2000 miles
it has become less noticeable, probably because the new cat is now full of soot. I have no idea if it will
still pass the emissions test next summer. I wish I'd paid more and got a Bosal, which at least are the same
size and shape as the originals, and may even be OEM.

Marco
 

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Discussion Starter #11
I think what I will do in any case is keep the old cat and look into having it refilled with a sports converter. I need to get a local 'artist' (as he is known) to build me a decent system at some point loosing the rear silencer in the process so I may as well start preparing.
 

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Got genuine alfa V6 one off my 1999 V6 166 Super, if anyone is stuck.
Keeping it "just in case".
 

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Discussion Starter #13
Just checked the cat that they wanted to install and it is half the size of the original Alfa one. on top of that, no hole for the O2 sensor. They reckon that "SIZE DOESN'T MATTER" either!! :lol: And we all know that of course it does!!! :D They said they would need to order one with the O2 sensor hole so I've told them to forget it if they plan on installing that small piece of rubbish...

So OLD FASHIONED ALF, lets talk about your stock item. :thumbs:
 

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Discussion Starter #14
OLD FASHIONED ALF, you star! Thanks so much for getting this out to me. It has arrived today and the honey comb is in one piece. I will finally be able to do a direct replacement myself which is always a bonus. Should be fun especially as I'm allergic to rust!!! :)

Rain for the next two days of course. Here's hoping that the weekend is not too soggy and I can get under there.

The AO community delivers yet again! :thumbs:
 
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